Climate change describes a change in the typical weather for a region — such as high and low temperatures and amount of rainfall — over a long period of time. Scientists have observed that, overall, Earth is warming. In fact, many of the warmest years on record have happened in the past 20 years. 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. What Is Climate Change? Climate change refers to long-term shifts in temperatures and weather patterns. Such shifts can be natural, due to changes in the sun's activity or large Vay Tiền Trả Góp Theo Tháng Chỉ Cần Cmnd.

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