nature & planetanalysisOur World in Data1750–present
A handful of rich countries account for most of the CO2 emitted since industrialisation began
Carbon dioxide stays in the atmosphere for centuries or millennia, so the total from past emissions matters as much as today's output. Since the industrial era began, the United States has emitted more CO2 than any other country, followed by China, Russia, Germany and the United Kingdom. Early industrialisers produced large shares before emissions from emerging economies grew. Counting by country shows that responsibility for warming is tied to historic energy use, not only to present emissions.
CO2 from burning coal, oil and gas accumulates because oceans and forests absorb only part of it each year. Emissions from a century ago still warm the planet today, so cumulative totals reveal different responsibilities than annual figures.
Cumulative totals shape debates over climate fairness, with poorer nations arguing that countries which industrialised first should bear more of the cost of cutting emissions.
Atmospheric CO2 was about 280 parts per million before the Industrial Revolution and has risen far above that since.
background
Greenhouse gas emissions (GHG emissions) from human activities intensify the greenhouse effect which contributes to climate change. Carbon dioxide (CO2) from burning fossil fuels (such as coal, oil, and natural gas) is the main cause of climate change. The largest annual emissions are from China followed by the United States, which has higher emissions per capita. Emissions from human activities have increased atmospheric carbon dioxide by about 50% over pre-industrial levels. The growing levels of emissions have varied, but have been consistent among all greenhouse gases. Over 60 billion tons were emitted in 2025, higher than any year before. Total cumulative emissions from 1870 to 2022 were 703 GtC (2575 GtCO2), of which 484±20 GtC (1773±73 GtCO2) from fossil fuels and industry, and 219±60 GtC (802±220 GtCO2) from land use change. Land-use change, such as deforestation, caused about 31% of cumulative emissions over 1870–2022, coal 32%, oil 24%, and gas 10%.
From Wikipedia: Greenhouse gas emissions (CC BY-SA 4.0) ↗