The only way to reduce temperatures is to reduce carbon.
The burning of #FossilFuels – #oil, #coal, and #NaturalGas – is the primary source of man-made atmospheric #CarbonDioxide. Since the start of the industrial revolution, humans have contributed more than 2,000 billion metric tons of carbon dioxide to the atmosphere.
After it is released into the atmosphere, the carbon dioxide is naturally redistributed between the #atmosphere, the #oceans, and the #biosphere. However, none of the emitted #carbon will return to the #Earth by natural processes for many tens of thousands of years.
As a result, the carbon that humans release by burning fossil fuels will lead to increased levels of carbon in the atmosphere, #ocean, and #biosphere for many thousands of years.
If carbon dioxide is allowed to continue to accumulate in the atmosphere, it will be impossible for the world to stay below 2.0°C, let alone 1.5°C.
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