Thawing permafrost releases greenhouse gases in a climate change feedback loop that worsens over time, fueling more warming and costly damage around the world.
Arctic warming will cost trillions of dollars to the global economy over time as the permafrost thaws and the sea ice melts—how many trillions depends on how much the climate warms, and even a half a degree makes a difference, according to a new study.
If nations don’t choose more ambitious emission controls, the eventual damage may approach $70 trillion, it concluded.
For tens of thousands of years, grasses, other plants and dead animals have become frozen in the Arctic ground, building a carbon storeroom in the permafrost that’s waiting to be unleashed as that ground thaws.
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