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summary of global warming - Global warming refers to the rise in Earth's average surface temperature. It is primarily due to increased greenhouse gases like carbon dioxide, methane, and nitrous oxide in the atmosphere. These gases trap heat, leading to changes in weather patterns, melting ice caps, rising sea levels, and extreme weather events. Human activities such as burning fossil fuels, deforestation, and industrial processes are major contributors. The impacts of global warming affect ecosystems, wildlife, and human communities worldwide. But amplifying feedbacks triggered by the greenhouse gases - darkening Earth from melting ice and snow, reduced sulfur emissions, and fewer clouds - account for much of the warming and will account for more than half of it in years to come.