Climate change is a change in the usual weather found in a place. This could be a change in how much rain a place usually gets in a year. Or it could be a change in a place's usual temperature for a month or season. Climate change is also a change in Earth's climate. Climate change (or global warming), is the process of our planet heating up. Scientists estimate that since the Industrial Revolution, human activity has caused the Earth to warm by approximately 1°C. While that might not sound like much, it means big things for people and wildlife around the globe. The Earth's climate is changing and the global climate is projected to continue to change over this century and beyond. 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. Introduction. Climate change refers to the shift in the Earth's usual weather conditions over many years. Our world has been getting hotter due to things humans are doing, like burning 1. Scientific information taken from natural sources (such as ice cores, rocks, and tree rings) and from modern equipment (like satellites and instruments) all show the signs of a changing climate. From global temperature rise to melting ice sheets, the evidence of a warming planet abounds. En español. .

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