We can’t reduce emissions, restore carbon sequestration, & halt biodiversity loss whilst global debt, & the endless expansionism necessary to service that debt continue to ensure ever-increasing harms.
1. Introduction – The core issues
Modern economies rest on ever-increasing debt that can only be serviced through continuous economic expansion. That expansion requires population growth (either in the same country or in export/investment countries), ongoing conversion of ecosystems, extraction of resources, and rising material and energy throughput. Official institutions (national governments and the UN system) simultaneously declare ambitious climate and biodiversity goals while the aggregate trajectory of emissions, land-use change, and biodiversity loss continues. The gap between rhetoric and biophysical outcomes constitutes systemic greenwashing.
2. The scale of global debt and the growth imperative
• Total global debt (government + household + corporate) surpassed $365 trillion in the first half of 2026, rising more than $10 trillion in six months (Institute of International Finance Global Debt Monitor).
• Global public (general government) debt stood at roughly 94% of GDP in 2025 and is projected by the IMF to reach 100% of GDP by 2029 (IMF Fiscal Monitor, April 2026).
• In a debt-based monetary system, interest obligations create a structural requirement for growth; without it, defaults, austerity, or inflationary resets become more likely. Literature linking debt dynamics to resource pressure (including agent-based models building on Keen’s work) shows that private and public debt can accelerate extraction when used for speculative or short-term revenue purposes rather than genuine productivity gains.
3. Debt pressure → intensified extraction and ecosystem conversion
High sovereign and external debt levels correlate with accelerated natural-resource extraction as governments seek foreign-exchange earnings or fiscal revenue to service obligations.
A. Empirical studies document positive associations between rising public/external debt and resource depletion (minerals, forests, fisheries) in developing economies.
B. The same applies in “developed” countries like Australia, which chase economic growth through increasing investments in the intensification and expansion of primary industries such as the beef industry, and fossil fuels and critical minerals mining, and real estate development. Canada is similar.
Countries like Australia and Canada are often classified as “advanced” or “developed” service economies, yet their fundamental economic engines look remarkably like those of resource-dependent nations.
Both countries rely heavily on a combination of extractive primary industries and domestic property markets (fuelled by mass immigration) to drive gross domestic product (GDP) growth.
Australia’s debt has now passed the $1 trillion mark.
The Australia-Canada Economic Model
Despite their high standards of living, both nations share a specific structural blueprint for economic growth:
Resource Extraction & Primary Industries: Both nations lean heavily on the expansion and intensification of natural resources. For Australia, this means massive investments in fossil fuels (coal and liquefied natural gas), critical minerals (iron ore, lithium), and intensive agriculture (such as beef production). Canada mirrors this with its oil sands, mining operations, and large-scale forestry and agriculture.
Real Estate & Population Growth: A significant portion of domestic wealth generation in both countries is tied to real estate development. This sector is continuously fueled by high rates of immigration, which expands the tax base and drives structural demand for housing and infrastructure, keeping GDP growth positive even when productivity lags.
The Paradox of “Development”
This economic strategy creates a unique set of “challenges” that economists and environmental scientists frequently point out:
The “Dutch Disease”: A heavy reliance on resource exports can push up the value of a nation’s currency. This makes other domestic sectors—like advanced manufacturing or technology—less competitive globally, leading to an economy that lacks diversification.
Ecological and Climate Pressures: Chasing growth through the intensification of primary industries directly conflicts with modern climate targets. Land clearing for cattle farming, high water usage, and fossil fuel extraction necessarily destroy local ecosystems and biodiversity, as well as adding to emissions and loss of carbon sequestration. Add to this the impact of vastly area-dependent and location specific renewable energy, which often targets high biodiversity areas on higher elevations which have previously escaped significant environmental degradation.
The “GDP per Capita” Divergence: While total GDP may grow due to population growth and resource booms, GDP per capita (the economic output per person) can stagnate or decline. This means that while the overall economy looks bigger on paper, individual living standards and housing affordability often worsen.
Ultimately, both Australia and Canada find themselves at a structural crossroads: navigating how to transition toward (claimed) low-carbon, high-tech, and knowledge-based economies while remaining deeply and increasingly tethered to the lucrative primary industries that built their wealth, especially through the necessity of servicing massive economic debts.
C. Case evidence from the Amazon, Congo Basin and Southeast Asia shows debt distress coinciding with expanded oil, gas and mining concessions overlapping intact forests.
D. Resource-backed loans and commodity-export drives under austerity conditions reduce regulatory capacity and push extraction frontiers into previously intact ecosystems.
4. Consequences for the biosphere and climate
• Biodiversity: The IPBES Global Assessment (2019) established that nature is declining globally at rates unprecedented in human history, driven primarily by land-use change and direct exploitation. The later Transformative Change Assessment (2024/2025) concludes that incremental reforms have failed and that deep systemic shifts are required to avoid irreversible tipping points (coral reefs, Amazon dieback, ice-sheet loss).
• Model intercomparisons project continued biodiversity decline under current socioeconomic pathways, with climate change amplifying land-use impacts.
• Climate: UNEP Emissions Gap Report 2025 finds that even full implementation of current Nationally Determined Contributions (NDCs) leaves the world on a 2.3–2.5 °C pathway this century; current policies point toward ~2.8 °C. Emissions in 2024 still rose year-on-year. Required cuts for 1.5 °C or well-below-2 °C pathways far exceed pledged reductions.
5. Official plans versus outcomes – the greenwashing gap
Governments and the UN framework (UNFCCC, CBD, SDGs) announce net-zero targets, 30×30 biodiversity goals and “nature-positive” language, yet:
• Aggregate emissions trajectories and land conversion rates remain incompatible with the stated temperature and extinction goals.
• Many net-zero pledges rely heavily on carbon offsets, future carbon-dioxide removal, or incomplete Scope coverage—approaches repeatedly criticised as accounting devices that delay absolute fossil-fuel reductions (UN expert group on net-zero integrity; independent analyses of offset effectiveness).
• Reviews of hundreds of climate policies find only a small minority deliver measurable large-scale emission reductions; the majority function more as virtue-signalling.
• Fossil-fuel production and subsidies continue in both major and minor economies even as 1.5 °C-compatible phase-out language is adopted at COPs. New climate pledges (2025 NDC round) produced only marginal improvement in projected warming - that is warming, with increased positive feedbacks, will still occur, only perhaps, not as much - at least on paper.
The result is a persistent mismatch: high-level declarations of action coexist with continued growth in material throughput, debt, and ecological destruction.
6. Structural reasons the gap persists
• Political and financial systems prioritise near-term debt service, employment and GDP growth over long-term biophysical limits.
• “Green growth” and absolute decoupling remain realistically non-existent, or at best empirically weak, at the global scale required, being dependent on the limitation of scope to include only energy generation fossil fuel emissions, and exclusion of offshored emissions as well as agricultural and “land use change” emissions, and loss of carbon sequestration and loss of non-carbon climate regulation.
• International institutions lack enforcement mechanisms; voluntary pledges and market-based instruments (offsets, voluntary carbon markets) face integrity and additionality problems.
7. Population as a multiplier of climate and biodiversity impacts – treatment (and relative neglect) in UN, IPCC, IPBES, and CBD frameworks
Population size and growth act as a fundamental multiplier in the classic IPAT (Impact = Population × Affluence × Technology) and related formulations. Larger numbers amplify per-capita consumption, “land conversion” / ecosystem destruction, resource extraction, emissions and extinction pressure even when average consumption or technology intensity improves. Historical data show that global population roughly doubled between ~1970 and the present while the economy grew nearly fourfold and trade tenfold, jointly driving demand for energy, materials and land (IPBES Global Assessment).
How the major bodies treat it:
IPCC: Full Assessment Reports (AR5, AR6) quantify population growth as a major historical driver of greenhouse-gas emissions (contributing ~1.2 % per year to emissions growth 1990–2019 in some analyses) and include it in Shared Socioeconomic Pathways (SSPs). Low-population pathways ease mitigation requirements. However, population receives limited or no explicit treatment in many Summaries for Policymakers, and the scenario ensembles submitted to recent reports undersample demographic uncertainty, converging strongly on the “middle-of-the-road” SSP2 pathway rather than higher UN probabilistic projections for regions such as sub-Saharan Africa and South Asia. Explicit discussion of voluntary family-planning or fertility policy as a mitigation/adaptation lever remains marginal compared with technology and energy measures.
IPBES: The 2019 Global Assessment identifies population growth (alongside economic growth) as an important indirect driver that has accelerated direct drivers (land-use change, exploitation, etc.). The later Transformative Change Assessment continues to list demographic trends among underlying causes but emphasises values, institutions, power concentration and consumption patterns. Some secondary analyses drawing on IPBES material argue that framing “overpopulation” as the primary cause risks scapegoating and distracts from unequal consumption; official high-level messaging therefore prioritises the latter.
UN Convention on Biological Diversity / Kunming-Montreal Global Biodiversity Framework (GBF): Draft and final GBF targets and related documents contain little or no direct reference to human population growth or rights-based fertility policies, despite expert inputs noting population as a key indirect driver that is not adequately covered. Emphasis falls on protected-area coverage (30×30), sustainable use, subsidy reform and consumption footprints.
Broader UN climate and biodiversity processes (COPs, NDCs, SDGs): Population stabilisation or reduction is almost never listed among core implementation measures. Official narratives stress “sustainable consumption and production,” technology transfer, finance and equity between high- and low-income countries. Critics (academic papers, Population Matters-type analyses, and some demographers) contend that this constitutes relative neglect of a multiplier whose effects compound over decades, especially given demographic momentum in high-fertility regions.
Population is not literally absent from the underlying science of these bodies, but it is systematically de-emphasised in high-level summaries, negotiated targets and recommended policy packages relative to its multiplicative role.
This selective focus allows continued growth in human numbers to compound the extraction and conversion pressures already driven by debt-fuelled economic expansion. The growth in human numbers and subsequent demand for resources, ecosystems destruction, and consumption, are seen as essential for servicing massive government debts via expansion of taxation bases, but are absolutely contrary to the intent of climate and biodiversity pledges. Rights-based approaches (education, voluntary family planning, women’s empowerment) that slow growth are acknowledged in passing yet rarely elevated to the same status as energy-system or land-use interventions.
Supporting Scientific Papers:
These sources collectively strengthen the case that population growth and rising affluence act as major, interacting drivers of biodiversity loss and anthropogenic climate change.
Dodson et al. (2020) – “Population growth and climate change: Addressing the overlooked threat multiplier”(Science of the Total Environment)
Demographic trends will influence the magnitude of climate disruption and the ability of societies to adapt to it.
Rights-based policy interventions could decrease fertility rates to levels consistent with low population pathways.
Following low population pathways would contribute to emission reductions and minimize climate risk.
Humane policies that slow population growth should be part of a multifaceted climate response
“Demographic trends will play a role in determining the magnitude of climate disruption and the ability of societies to adapt to it. Yet policy makers largely ignore the potential of fertility changes and population growth when designing policies to limit climate disruption and lessen its impacts. Here we argue that rights-based policy interventions could decrease fertility rates to levels consistent with low population pathways. We review country and global level studies that explore the effects of low population pathways on climate change mitigation and adaptation. We then provide rights-based policy recommendations, such as the expansion of voluntary family planning programs that incorporate elements from successful past programs, and highlight current research gaps. In concert with policies that end fossil fuel use and incentivize sustainable consumption, humane policies that slow population growth should be part of a multifaceted climate response. These policies require attention from scientists, policy analysts and politicians.”
Core claim: Demographic trends are a significant but largely ignored “threat multiplier” for climate disruption. Higher population pathways increase emissions, raise adaptation challenges, and amplify risks. Low-population pathways (achievable via rights-based measures such as expanded voluntary family planning and education) would meaningfully reduce emissions and climate risk.
Key contribution: Positions population policy as complementary to fossil-fuel phase-out and sustainable-consumption measures, not a substitute. Critiques the relative neglect of fertility/population levers compared with speculative technologies (e.g., BECCS).
Relevance: Directly supports the argument that official frameworks (IPCC summaries, policy packages) under-weight population as a multiplier. Strong peer-reviewed source.
European Scientist summary of Marques et al. (2019) – “Increasing impacts of land use on biodiversity and carbon sequestration driven by population and economic growth”(Nature Ecology & Evolution)
“Technology is making agriculture more efficient, however, technological advances may not be enough to counteract the impacts of an increasing global population on the environment. Rapid population growth and more widespread affluence are leading to an increase in land use worldwide and driving biodiversity loss, according to a new study published on 4 March in Nature Ecology & Evolution (1).
Humans appear to be caught in a catch 22. Loss of biodiversity ― mainly driven by agricultural expansion ― threatens global food supplies, however, the growing demand for food to feed an ever-increasing number of mouths requires newly cultivated lands.
Agriculture is now known to be one of the main factors associated with biodiversity loss (2). In particular, land-use changes and unsustainable management practices, including over-exploitation of soil and over-reliance on pesticides, herbicides, and other chemicals. New technologies have the potential to reduce the use of environmentally damaging chemicals in the agricultural industry and make land use more efficient. But is this enough to counteract the environmental damage?”
Core claim: Between 2000 and 2011, overall population and economic growth increased total impacts on bird diversity (3–7 % rise in species at risk of extinction from land use) and carbon sequestration (6 % reduction), even though impacts per unit of GDP declined due to efficiency gains. Cattle farming was the largest biodiversity driver; oilseed production showed the biggest increases; forestry hit carbon sequestration hardest. Tropics suffered most biodiversity loss; remote (trade-driven) responsibility grew.
Key contribution: Demonstrates that technological/efficiency improvements were outpaced by the scale of population + affluence growth. Explicitly links both drivers to rising absolute environmental pressure.
Relevance: Excellent quantitative evidence that rising numbers and rising per-capita demand together drive land-use conversion and ecosystem-service loss. The original Nature paper (covered below) is high-impact.
The link between population growth and biodiversity loss (Amy Jankiewicz / Guardian / Population Matters, Feb 2026)
Core claim: Population growth is a major indirect driver of biodiversity loss (via expanding food production) and is identified as such in UK government assessments and IPCC material. Addressing it (alongside consumption) is necessary; the taboo around discussing it is counterproductive.
Key contribution: Public-facing synthesis that cites official reports linking projected population rise (to ~9.7 billion by 2050) to intensified pressure on natural systems. Calls for ending the taboo.
Relevance: Useful as a contemporary illustration of the argument in mainstream media, though it is an opinion/letter rather than primary research. It reinforces the “overlooked” theme.
Increasing impacts of land-use on biodiversity and carbon-sequestration driven by population and economic growth - Marques et al. (2019) (Nature Ecology & Evolution)
“Biodiversity and ecosystem service losses driven by land use change are expected to intensify as a growing and more affluent global population requires more agricultural and forestry products, and teleconnections in the global economy lead to increasing remote environmental responsibility. By combining global biophysical and economic models, we show that between the years 2000-2011 overall population and economic growth resulted in increasing total impacts on bird diversity and carbon sequestration globally, despite a reduction of land–use impacts per unit of GDP. The exceptions were North America and Western Europe, where there was a reduction of forestry and agriculture impacts on nature, accentuated by the 2007-2008 financial crisis. Biodiversity losses occurred predominantly in Central and Southern America, Africa and Asia with international trade an important and growing driver. In 2011, 33% of Central and Southern America and 26% of Africa’s biodiversity impacts were driven by consumption in other world regions. Overall, cattle farming is the major driver of biodiversity loss, but oil seeds production showed the largest increases in biodiversity impacts. Forestry activities exerted the highest impact on carbon sequestration, and also showed the largest increase in the 2000-2011 period. Our results suggest that to address the biodiversity crisis, governments should take an equitable approach recognizing remote responsibility, and promote a shift of economic development towards activities with low biodiversity impacts.”
Absolute impacts rose because population and economic growth outweighed per-unit efficiency gains. International trade transferred substantial biodiversity impacts from consuming regions to producing regions (especially Central/South America and Africa).
Relevance: Strengthens the scientific base for the claim that both population growth and rising affluence (via GDP and consumption) are driving forces.
Cafaro, Hansson & Götmark (2022) – “Overpopulation is a major cause of biodiversity loss and smaller human populations are necessary to preserve what is left” (Biological Conservation)
Global biodiversity decline is driven in large part by excessive human populations.
Population decline opens up important opportunities for ecological restoration.
Further research is needed into how human demographic changes help or hinder conservation efforts.
Conservation biologists should advocate for smaller populations, in both less developed and more developed nations.
“Global biodiversity decline is best understood as too many people consuming and producing too much and displacing other species. Wild landscapes and seascapes are replaced with people, our domestics and commensals, our economic support systems, and our trash. Conservation biologists have documented many of the ways that human activity drives global biodiversity loss, but they generally neglect the role of overpopulation. We summarize the evidence for how excessive human numbers destroy and degrade habitats for other species, and how population decrease opens possibilities for ecological restoration. We discuss opportunities for further research into how human demographic changes help or hinder conservation efforts. Finally, we encourage conservation biologists to advocate for smaller populations, through improved access to modern contraception and explicit promotion of small families. In the long term, smaller human populations are necessary to preserve biodiversity in both less developed and more developed parts of the world. Whether the goal is to save threatened species, create more protected areas, restore degraded landscapes, limit climate disruption, or any of the other objectives key to preserving biodiversity, reducing the size of the human population is necessary to achieve it.”
Core claim: Global biodiversity decline is best understood as “too many people consuming and producing too much and displacing other species.” Excessive human numbers drive habitat conversion, overexploitation, etc. Population decrease creates opportunities for ecological restoration (evident in parts of Europe). Conservation biologists should advocate smaller populations via contraception access and promotion of small families. Smaller populations are necessary (though not sufficient alone) in both developed and developing regions.
Key contribution: Explicit, evidence-based argument that overpopulation is a major (not the sole) cause, and that long-term biodiversity preservation requires limiting human numbers. Reviews supporting literature and calls for advocacy.
Relevance: Strongest direct statement among the set that smaller human populations are required. Complements the multiplier framing and counters claims that only wealthy consumption matters.
Empirical work further shows that rising incomes in developing economies are associated with increased deforestation (Crespo Cuaresma et al., 2017) and that the emergence of more than a billion ‘new consumers’ has already generated substantial additional pressure through meat consumption and vehicle ownership (Myers & Kent, 2003/2004):
Mongabay (2017) summary of Crespo Cuaresma et al. (2017)
“Deforestation rises with incomes in developing economies” (Scientific Reports).
“In effect, they tested their hypothesis with this “natural experiment” in which the differences in forest cover could be ascribed to the economic disparity between the countries found on either side of the border.
They found that in the poorest countries, this effect was clear. In particular, as per capita incomes rose, so did the level of deforestation.
For example, agricultural expansion in western Brazil has led to significant deforestation in the region, while forest on the other side of its border in Bolivia – one of South America’s poorest countries – has remained relatively unscathed.
They also expected a reversal of this trend in comparing middle-income or emerging economies with wealthier countries, but it wasn’t clear whether that part of their hypothesis held.
“Eventually, as countries get rich enough and there is enough demand for environmental quality, you would expect reforestation to take place,” Crespo Cuaresma said. “That is the part where we have not found strong evidence.”
What is clear, he said, was the importance that sub-Saharan Africa will likely have in the future as we search for ways to stem climate change.
“The future of sub-Saharan Africa seems to be particularly central to what’s going to happen with climate change challenges in the future,” he added.
Home to some of the poorest countries in the world, those economies are still expected to grow. As Crespo Cuaresma and his colleagues have shown, that will likely mean a decline in forest cover.
“This is particularly worrying because Africa is home to some of the world’s largest tracts of remaining undisturbed forests,” said Ian McCallum in a statement. McCallum is a remote sensing scientist at IIASA and coauthor of the study.
“Factors that keep deforestation in check in other tropical regions of the world, like good governance, monitoring systems, and peace, are lacking in much of tropical Africa,” he said.”
Using satellite forest-cover data and economic data across 130 countries (especially border comparisons), the study finds a clear positive link in poorer countries: rising per-capita incomes are associated with increased deforestation.
The expected later “Environmental Kuznets Curve” reversal (reforestation at higher income levels) was not strongly supported. This is particularly relevant for future growth in sub-Saharan Africa and other developing regions that still hold large intact forests.
This is direct evidence that rising affluence in developing economies drives land-use conversion and biodiversity pressure.
Myers & Kent – “New consumers: The influence of affluence on the environment”
(2003 PNAS paper + 2004 Island Press book The New Consumers).
“Growing consumption can cause major environmental damage. This is becoming specially significant through the emergence of over 1 billion new consumers, people in 17 developing and three transition countries with an aggregate spending capacity, in purchasing power parity terms, to match that of the U.S. Two of their consumption activities have sizeable environmental impacts. First is a diet based strongly on meat, which, because it is increasingly raised in part on grain, puts pressure on limited irrigation water and international grain supplies. Second, these new consumers possess over one-fifth of the world's cars, a proportion that is rising rapidly. Global CO 2 emissions from motor vehicles, of which cars make up 74%, increased during 1990–1997 by 26% and at a rate four times greater than the growth of CO2 emissions overall. It is in the self-interest of new consumer countries, and of the global community, to restrict the environmental impacts of consumption; this restriction is achievable through a number of policy initiatives.”
Identifies more than 1 billion “new consumers” in 17 developing + 3 transition countries whose aggregate purchasing power (in PPP terms) already matched that of the United States at the time. Two high-impact consumption patterns are highlighted:
Meat-heavy diets (increasingly grain-fed), which intensify pressure on land, water and grain supplies.
Rapid growth in car ownership (already >20 % of the global fleet and rising), driving CO₂ emissions and local pollution.
The authors argue that the environmental consequences of this new affluence are large enough that it is in the self-interest of both the new-consumer countries and the global community to constrain the damage.
This is a classic, widely cited demonstration that rising affluence (not only absolute population numbers) multiplies environmental impact, especially through diet and transport.
“Affluence drives the global displacement of land use”
“Increasing affluence is often postulated as a main driver for the human footprint on biologically productive areas, identified among the main causes of biodiversity loss, but causal relationships are obscured by international trade. Here, we trace the use of land and ocean area through international supply chains to final consumption, modeling agricultural, food, and forestry products on a high level of resolution while also including the land requirements of manufactured goods and services. In 2004, high-income countries required more biologically productive land per capita than low-income countries, but this connection could only be identified when land used to produce internationally traded products was taken into account, because higher-income countries tend to displace a larger fraction of land use. The equivalent land and ocean area footprint of nations increased by a third for each doubling of income, with all variables analyzed on a per capita basis. This increase came largely from imports, which increased proportionally to income. Export depended mostly on the capacity of countries to produce useful biomass, the biocapacity. Our analysis clearly shows that countries with a high biocapacity per capita tend to spare more land for nature. Biocapacity per capita can be increased through more intensive production or by reducing population density. The net displacement of land use from high-income to low-income countries amounted to 6% of the global land demand, even though high-income countries had more land available per capita than low-income countries. In particular, Europe and Japan placed high pressure on ecosystems in lower-income countries.”
Papers of this type typically argue that rising per-capita consumption and international trade, rather than population size itself, are the dominant drivers of environmental pressure, land-use displacement, and biodiversity/climate impacts. They often frame population growth as secondary or as a distraction from unequal consumption patterns concentrated among the wealthy or high-income countries.
Strengths
Correctly highlights the role of international trade in displacing environmental impacts (e.g., land use, deforestation, emissions) from high-income consuming countries to lower-income producing regions.
Provides useful quantification of how higher incomes correlate with larger per-capita ecological footprints when trade is accounted for.
Underscores legitimate equity concerns: the world’s poorest people contribute negligibly to cumulative emissions and resource demand, however emissions are only one aspect of climate impacts (ignoring impacts on remaining biodiversity, carbon sequestration, and non-carbon climate regulation), and per capita analyses disingenuously ignore “the elephant in the room” - total population size and growth - choosing only one axis of the problem to consider, and ignoring trajectories.
The authors acknowledge that fewer people per land area allows more land to be spared for nature: “Our analysis clearly shows that countries with a high biocapacity per capita tend to spare more land for nature. Biocapacity per capita can be increased through more intensive production or by reducing population density.” Obviously more intensive production increases harm per land area, such as more emissions, loss of carbon sequestration, and loss of biodiversity - the only environmentally satisfactory way to address this is to reduce population density.
Key limitations and why it does not refute the population-multiplier case
False dichotomy between population and affluence
The IPAT identity (Impact = Population × Affluence × Technology) is multiplicative. Rising numbers of people and rising average consumption both scale total impact. Demonstrating that affluence matters does not erase the contribution of population size. Studies such as Marques et al. (2019), Crespo Cuaresma et al. (2017), and Myers & Kent (2003/2004) show both factors operating simultaneously: population growth supplies more consumers while rising incomes (especially the rapid expansion of “new consumers” in developing economies) raise per-person demand for meat, vehicles, energy and land.
Neglect of scale and demographic momentum
Even if average consumption were held constant, adding billions more people increases absolute demand for food, housing, energy and materials. Scenario work (e.g., O’Neill et al. and related IPCC-linked analyses) shows that alternative population pathways can alter cumulative emissions by tens of percent by mid-to-late century. Ignoring this scale effect understates long-term pressure on ecosystems and the climate system.
Incomplete treatment of developing-country dynamics
As incomes rise in populous developing regions, the combination of larger populations plus higher per-capita consumption produces the largest absolute increments in resource use and emissions (see also the “new consumers” literature). Focusing solely on historical rich-country overconsumption misses the forward-looking multiplier effect - trends and projections. Additionally, as developing countries increase affluence, they exert deleterious land use and biodiversity impacts on other countries, including “developed” countries. A case in point is the augmentation of the land-use, deforestation, and emissions impacts (and animal abuse, including wildlife slaughter) of the Australian beef industry by the combination of population growth and rising affluence in Asian export countries.
Policy implication risk
By downplaying population, such papers reinforce the very taboo that Dodson et al. (2020), Cafaro et al. (2022) and others criticise. Rights-based measures that slow population growth (education, voluntary family planning) remain low-cost, high-co-benefit interventions that complement—not replace—demand-side and technology measures.
These sources reinforce the dual-driver point already present in Marques et al. (2019) and the earlier papers: population growth supplies the numbers, while rising affluence (especially the rapid expansion of middle-class consumption in developing countries) multiplies per-person impact. Together they undercut any framing that attributes environmental harm solely to “the greed of the wealthy” in rich countries while ignoring demand growth elsewhere.
These sources provide solid, mutually reinforcing support:
Population growth multiplies climate and biodiversity impacts (Dodson; IPCC citations within them).
Rising affluence/economic growth compounds the pressure via land use and consumption (Marques et al.), and increases other deleterious impacts including rising meat consumption, car ownership (Myers and Kent), and increasing deforestation (Cuaresma).
Absolute environmental harm has increased despite supposed efficiency gains because scale (numbers × affluence) dominates.
Smaller populations open restoration possibilities and are necessary for long-term preservation (Cafaro et al.).
They do not claim population is the only driver; they treat it as a fundamental multiplier interacting with consumption and technology. This is consistent with the IPAT framework - as are the works showing that rising affluence also has adverse impacts via increasing deforestation, meat consumption, car ownership, and overall consumption. The Cafaro and Dodson papers are particularly useful for the “official frameworks under-weight population” critique, while Marques supplies clear quantitative evidence on land-use and carbon impacts.
Many social-media accounts, journalists, mainstream media outlets, and some academics dispute or minimise the role of population growth (and rising affluence) in climate change and biodiversity loss, attributing the crises almost exclusively to the greed of the wealthy. This framing neglects a basic economic reality: the profitability of investments in resource extraction, agriculture, infrastructure and consumer goods is sustained by rising aggregate demand, which itself is the product of both population growth and increasing per-capita affluence—particularly the rapid expansion of middle-class consumption in developing countries. By focusing solely on unequal distribution of wealth while treating population size as irrelevant or taboo, such arguments become incomplete and, in practice, obstructive to real change and reversal of biodiversity loss and emissions increases. Both the expanding demand for food, materials and energy generated by more people living more affluent lifestyles, and the profit-driven systems that capitalise on that demand (and that often shape government priorities), act in tandem. Together they distract attention from population growth as a structural multiplier of environmental pressure and simultaneously enable its continuation. Acknowledging this dual dynamic is not a denial of inequality or corporate power; it is a recognition that ignoring either side of the equation leaves the biophysical drivers of ecosystem destruction and climate change only partially addressed.
Given that economic expansionism, of which population growth is an integral part, is necessitated by vast and rapidly increasing levels of debt, its completely disingenuous of governments, the UN and various NGOs to claim that they are satisfactorily conserving ecosystems and biodiversity, and reducing emissions, whilst these processes are in play.
This is systemic greenwashing of the highest order.
8. Conclusion – implications
Endless growth, and population increase, to service a $365-trillion debt stock is biophysically incompatible with stabilising the climate and halting mass extinction on a finite planet. Current governmental and UN frameworks largely manage the narrative of action while the underlying drivers—debt-fuelled expansion and resource conversion and biosphere destruction —continue. Credible pathways would require either (a) orderly debt restructuring and demand reduction in high-consuming economies, or (b) acceptance that ecological overshoot will be resolved by collapse rather than policy. Neither option is currently on the official agenda.
References
