Inequality

№ 2026-63 · October 2026 · 21 min

Convergent Development as Polycrisis Risk Reduction

Countries vulnerable in 2000 have closed their human-development gap at about 0.3% a year, a half-life of two centuries. Those that avoided reversals closed it three times faster, while reversals erased 13% of their gains. Higher human development makes reversals shallower and polycrisis risk lower (r = −0.84). Faster convergence with halved reversals would bring 38 of 60 vulnerable countries past an HDI of 0.70 by 2050, against 17 at the recent pace.

№ 2026-59 · October 2026 · 20 min

Addressing the Pollution–Poverty–Climate Feedback Loop

Burning coal, oil, gas and biofuels caused 48% of the 3.8 million deaths from outdoor fine particles in 2017, the same combustion that drives climate change. Each million tonnes of fossil CO₂ carries about 105 deaths a year in lower-middle-income countries and 9 in rich ones, so poorer countries, which emit 11% of fossil CO₂, bear 34% of fossil-fuel air-pollution deaths. Cleaning the air must be paired with methane cuts: alone it adds 0.26°C by 2050, but with methane cuts only 0.02°C.

№ 2026-57 · October 2026 · 20 min

Escaping the Pollution–Poverty Trap

Forty-eight countries, 36 of them in sub-Saharan Africa, are trapped in two or more degradation cycles, and they hold 78% of the world's extremely poor. Polluting cooking fuel, missing sanitation and forest loss move together even among countries at the same income. Fifty-two countries escaped at least one cycle after 2000, through clean-cooking drives, sanitation campaigns and forest recovery, and cut extreme poverty by a median 26 points, more than twice as much as those that stayed trapped. Air pollution is the cycle growth has not broken.

№ 2026-56 · October 2026 · 20 min

Breaking the Climate–Development Trap

After a severe climate shock, GDP per person in low- and lower-middle-income countries falls by 1.7%, sinks to about 5% below its previous path within four years and is still 3.7% lower after eight. Upper-middle-income countries recover within four years, and earthquakes leave no lasting scar. Low-income countries now suffer climate shocks in a quarter of all years, only one in five of these has any recorded damage, and the income gap between the median rich and poor country has grown from 18 to 25 times since 1990.

№ 2026-55 · October 2026 · 20 min

The Green Development Dividend

Closing every extreme-poverty gap with targeted transfers would add just 0.07% to global CO₂. Reaching the same goal through broad growth at today's carbon intensity would add about 100 times as much. Most countries escaped mass poverty at under 2 tonnes of CO₂ per person, and 44 developing countries with 4.2 billion people cut poverty and carbon intensity together after 2015. Explicit fossil-fuel subsidies of $725 billion a year are more than six times the extreme-poverty gap.

№ 2026-54 · October 2026 · 19 min

The Clean Cooking Transition

In low- and middle-income countries, 69% of people now cook mainly with gas or electricity, up from 27% in 1990, but 2.03 billion still rely on wood, charcoal, coal or kerosene. In sub-Saharan Africa the number using polluting fuels has risen by about 340 million since 2000, and charcoal users have more than tripled. At least 1.37 billion people without clean cooking already have electricity, which makes efficient electric cooking a second lane alongside LPG. Even so, the 2015–2023 pace would leave about 1.6 billion people without clean cooking in 2030.

№ 2026-47 · October 2026 · 17 min

The Geography of Human Pollution Exposure

Pollution and people concentrate in the same places: the average person breathes air 1.53 times dirtier than the average inhabited square kilometre. But most of a city's pollution is not its own — in the median city the background 165 km away is 79% as polluted as the centre, and the wind carries city smoke downwind. Exposure is most unequal by income: 41.7 µg/m³ for lower-middle-income countries, 3.2 times the high-income level — so clean air needs regional, not just urban, action.

№ 2026-42 · October 2026 · 17 min

Wet-Bulb Temperatures and the Emerging Geography of Unsurvivable Heat

No site analysed reaches the 35 °C wet-bulb ceiling before about 4.4 °C of global warming; the binding line is lower. Healthy young adults lose the ability to cool themselves in humid heat near 30.5 °C, a level 11 of 161 sites reached for at least an hour in 2024. Under current policies, about 2.8 °C, the cities touching it would hold 161 million people, up from 9 million today — around the Gulf, across South Asia and in eastern China.

№ 2026-40 · October 2026 · 18 min

Heat Stress, Labor Productivity, and the Hidden Economic Cost of Warming

Heat cut work capacity enough in 2024 to put about $490 billion of output at risk, a conservative estimate from hourly heat stress in 149 cities. The Lancet Countdown's broader estimate is $1.09 trillion. Either figure is of the same order as all climate damages in the DICE model at 1.5 °C. The loss is regressive (3% of hours in lower-middle-income countries against 0.2% in rich ones) and convex: one extra degree adds 73%, two nearly triple it. Moving work out of the afternoon recovers 20–30%.

№ 2026-38 · October 2026 · 18 min

The Compounding Burden of Heat and Air Pollution

Very hot days are deadlier when the air is dirty: across 620 cities, a very hot day raised deaths by 12.8% when particle pollution was high against 5.3% when it was low. And the two hazards travel together — in 2024 ozone was higher on hot days in 131 of 149 large cities. About 2.6 billion people live in countries that are both hot and polluted, three-quarters of the population of lower-middle-income countries against 4% in high-income ones.

№ 2026-37 · October 2026 · 16 min

The Unequal Geography of Human Air Pollution Exposure

The poorest half of humanity breathes 66% of the world's fine-particle exposure above the WHO guideline. Exposure peaks not in the poorest countries but in lower-middle-income ones, where industry, dense cities and solid-fuel cooking coincide: their population-weighted average is 42.5 µg/m³, against 12.5 in high-income countries. Since 2010 three in four high-income countries have cleaned their air, against fewer than half of lower-middle-income ones.