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Natural causes or human activity A variety of factors, both natural and human, can influence the Earth's climate system. The world's climate varies naturally. Global climate change has already had observable effects on the environment. Glaciers have shrunk, ice on rivers and lakes is breaking up earlier, plant and. Climate change is any significant change in climate lasting for an extended period of time. Climate change includes major changes in temperature.

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What is climate change (a.k.a. global warming) & why is it happening? We explain how it affects our planet & how we can prevent it. Climate change encompasses not only rising average temperatures but also extreme weather events, shifting wildlife populations and habitats, rising seas, and a. Population and climate change are inextricably linked. Every additional person increases carbon emissions — the rich more than the poor — and increases the.

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Climate change threatens people with food and water scarcity, increased flooding, extreme heat, more disease, and economic loss. Human migration and conflict. While changes in solar irradiance may have affected global climate in the last century, a % change irradiance, the order of estimated changes, results in. Climate change is also having an impact on people and communities. Changes in sea ice, precipitation, snow cover, temperatures and tundra productivity are.