The growing scientific consensus is that this warming is largely the result of emissions of carbon dioxide and other greenhouse gases from human activities including industrial processes, fossil fuel combustion, and changes in land use, such as deforestation. Projections of future warming suggest a global increase of 2.5ºF (1.4ºC) to 10.4ºF (5.8ºC) by 2100. In addition to warming, increases in sea level and changes in precipitation, including more frequent floods and droughts, are likely. These changes, over time, are referred to broadly as "climate change".

‘Global Warming’. An OpenLearn chunk used/reworked by permission of The Open University copyright © (2007).’