00:00Earth's atmosphere is a delicate balance.
00:05PPM, or parts per million, means that for every million molecules in the atmosphere,
00:11there used to be around 270 molecules of carbon dioxide.
00:16Today, we're at around 423 parts per million of CO2.
00:21And since temperature records have been annually recorded,
00:25the average temperature has risen close to a critical 1.5 degrees of warming.
00:31What seems like such a small amount can have an enormous effect on the climate.
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