Climate change refers to changes in weather patterns and growing seasons around the world. It also refers to sea level rise caused by the expansion of warmer seas and melting ice sheets and glaciers. Global warming causes climate change, which poses a serious threat to life on Earth in the forms of widespread flooding and extreme weather. Climate change, the periodic modification of Earth's climate caused by atmospheric changes and the atmosphere's interactions with geologic, chemical, biological, and geographic factors. Loosely defined, climate is the average weather at a distinct place that incorporates temperature, precipitation, and other features. What We Know About Climate Change | MIT Climate Portal. New to Climate Change? Visit the MIT Climate Primer. What We Know About Climate Change. The Earth's climate is changing faster today than ever before in the history of our species - and human actions are the main reason why. The Science. Causes and Effects of Climate Change. Fossil fuels - coal, oil and gas - are by far the largest contributor to global climate change, accounting for over 75 per cent of global greenhouse Climate change is the long-term shift in the Earth's average temperatures and weather conditions. The world is now about 1.1C warmer than in the late 19th Century. Are ytMW.

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