China invented the concept of global warming

What we know

Trump has repeatedly claimed, including in a widely shared 2012 social media post that resurfaced often in later years, that the concept of global warming was created by and for China in order to make US manufacturing less competitive. He has used this framing at various points to justify skepticism of climate policy and to support withdrawing the United States from the Paris Agreement.

The timeline alone contradicts the claim. The basic physics of the greenhouse effect, the process by which certain gases in the atmosphere trap heat, was described by scientists including Joseph Fourier in the 1820s and John Tyndall in the 1850s, and Swedish chemist Svante Arrhenius calculated in 1896 that rising carbon dioxide levels from burning coal could warm the planet's surface. These foundational findings predate the People's Republic of China's founding in 1949 by more than a century, and predate China's major industrial expansion, which began accelerating mainly after economic reforms in the late 1970s and especially after 2001, by even longer. A concept cannot be invented by a country decades before that country's government exists in its modern form.

Modern climate science built on this early foundation through work carried out across many countries. Charles David Keeling's continuous measurements of atmospheric carbon dioxide at Mauna Loa Observatory, begun in 1958, produced the now-famous Keeling Curve showing a steady rise in CO2 concentration that has continued for over six decades. The Intergovernmental Panel on Climate Change, established in 1988 by the United Nations Environment Programme and the World Meteorological Organization, synthesizes research from thousands of scientists across dozens of countries, including the United States, the United Kingdom, Germany, Japan, and many others, not a single national government. NASA's Goddard Institute for Space Studies, NOAA, and national academies of science in numerous countries independently maintain their own long-term temperature records, and all of them show close agreement on the extent and pace of recent warming, which would be an extraordinary coincidence if the underlying data were fabricated by any single government.

The scientific consensus on this question is about as strong as consensus gets in any field. Surveys of published climate research, including a widely cited 2013 analysis of nearly 12,000 peer-reviewed papers, found that more than 97% of studies taking a position on the cause of recent warming attributed it primarily to human activity. NASA's public summary of the evidence states plainly that multiple independent lines of evidence, including rising global average temperatures, shrinking ice sheets, rising sea levels, and ocean acidification, point to human greenhouse gas emissions as the dominant driver of warming since the mid-20th century.

There is a genuine and separate policy conversation about how China's rapid industrialization has affected global emissions in recent decades. China became the world's largest annual emitter of carbon dioxide by the mid-2000s, a well documented fact tracked by the International Energy Agency and other bodies, and this is a legitimate point of discussion in international climate negotiations regarding fair distribution of emissions reduction responsibility between developed and developing economies. That discussion, however, is entirely separate from the claim that China fabricated the underlying science, which conflates a real debate about present-day emissions accounting with a false claim about the origin and validity of over a century of physics and climate observation.

Fact-checkers who have reviewed Trump's specific statements found no evidence supporting the idea that Chinese scientists, officials, or institutions created or promoted the concept of anthropogenic warming as an economic weapon. The scientific record shows the opposite sequence: European and American scientists developed the theory and the measurement techniques over more than a century, and only much later did China's own scientific institutions, like those of most industrialized nations, begin contributing research to a field that had already been established for generations.

Common claims

• China invented the concept of global warming.Not supported
• Climate change science is a hoax designed to hurt US industry.Not supported
• The greenhouse effect was discovered recently.Not supported - first described in the 1820s
• China's rising emissions are a legitimate topic in climate policy debates.Supported

Evidence hierarchy

All sources

• Scientific consensus: Earth's climate is warmingNASA · 2026
• Trump and conspiracy theoriesThe New York Times · 2025
• IPCC Sixth Assessment ReportIntergovernmental Panel on Climate Change · 2021
• The Keeling CurveScripps Institution of Oceanography, UC San Diego · 2026
• Quantifying the consensus on anthropogenic global warming in the scientific literatureEnvironmental Research Letters · 2013

Related terms