Scientists look to the sky in effort to mitigate carbon problem

A global research effort has assessed two promising technologies to remove carbon dioxide from the atmosphere. While still in the early stages of development, direct air carbon capture and sequestration (DAC) -- together with other carbon dioxide removal strategies -- are considered critical to achieving a net-zero greenhouse gas emissions economy by 2050 and limiting global warming to less than 1.5 degrees Celsius by 2100.

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