Global Warming

Global Warming

About Global Warming

Global warming is the rise in the average temperature of Earth's atmosphere and oceans since the late 19th century and its projected continuation. Warming of the climate system is unequivocal, and scientists are more than 90 percent certain that it is primarily caused by increasing concentrations of greenhouse gases produced by human activities such as the burning of fossil fuels and deforestation. These findings are recognized by the national science academies of all major industrialized nations.

Contributions by Ed Poor, William M. Connolley, and Sheldon Rampton.

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