![]() Nearly all actively publishing climate scientists say humans are causing climate change. : 7 This human role in climate change is now considered "unequivocal" and "incontrovertible". : 8 : 11 This warming is mainly caused by the rapid increase in atmospheric carbon dioxide (CO 2) since 1750 from human activities such as fossil fuel combustion, cement production, and land use changes such as deforestation, : 10–11 with a significant supporting role from the other greenhouse gases such as methane and nitrous oxide. ![]() There is a strong scientific consensus that the Earth has been consistently warming since the start of the Industrial Revolution, and the rate of recent warming is largely unprecedented. Observed global warming: Global average temperature data from various scientific organizations show substantial agreement concerning the progress and extent of global warming: pairwise correlations for long-term datasets (1850+ and 1880+) exceed 99.1%. Evaluation of climate change by the scientific community
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