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Fourier calculated that the earth would be much colder if there was no atmosphere.
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Tyndall discovers that some gases block infrared radiation. He suggests that changes in the concentration of the gases could bring climate change
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147 different weather sites show that the earths temperature has started to rise since a decade ago.
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A US President's Advisory Committee panel warns that the greenhouse effect is a matter of "real concern".
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First UN environment conference, in Stockholm. Climate change hardly registers on the agenda, which centers on issues such as chemical pollution, atomic bomb testing and whaling. The United Nations Environment Program (Unep) is formed as a result.
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US scientist Wallace Broecker puts the term "global warming" into the public domain in the title of a scientific paper.
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UK Prime Minister Margaret Thatcher warns in a speech to the UN that "We are seeing a vast increase in the amount of carbon dioxide reaching the atmosphere... The result is that change in future is likely to be more fundamental and more widespread than anything we have known hitherto." She calls for a global treaty on climate change.
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world leaders come to gather in Rio de Janeiro to create a treaty and fix the problem of global warming.
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World leaders gather in Paris and create laws and limits around what humans can and can not do in there countries to help slow down global warming.
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Obama signs the climate change accord in Paris
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Trump is threatening to pull out of Paris climate agreement.
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California-led alliance of states and cities across america to hold the Paris climate accord intact.
