what percent of the carbon that humans have emitted to the atmosphere is still in the atmosphere? i.e.: has not been taken up by photosynthesis on land or in the ocean?

Respuesta :

About 55 percent of the extra carbon that humans have added to the atmosphere so far has been absorbed by land plants and the ocean, with the remaining 45 percent remaining in the atmosphere.

When carbon dioxide (CO2) from burning fossil fuels is released into the atmosphere, around 50% of it stays in the atmosphere, 25% is absorbed by land plants and trees, and the remaining 25% is absorbed into specific oceanic regions. Despite an increase in the amount of carbon dioxide entering the ocean, its ability to absorb emissions—about 31%—has remained mostly steady. In a cycle that affects almost all life on Earth and controls the climate, carbon moves between the atmosphere, land, and ocean.

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