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Thee the earth has cooled and warmed before, but it always takes tens of thousands of years for any noticeable change.

Since the Industrial Revolution when we began burning fossil fuels (coal, oil and natural gas), we have almost doubled the amount of carbon dioxide in the atmosphere.


We know carbon dioxide is a greenhouse gas that traps heat. We have increased its levels in the atmosphere; the temperature is rising.


Scientists and governments all over the world know that we are causing global warming. The Paris Climate convention (2015) collected goals from every country about reducing carbon dioxide levels.

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Q: Why do people think humans are causing global warming when the earth has cooled and warmed countless times in earth's history more than today and no one one was burning fossil fuels until recently?
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