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Why use oceans to absorb CO2 may not be as easy as expected

The world’s oceans are wonderful carbon sponges, capturing a quarter of man-made carbon dioxide when surface water reacts with greenhouse gases in the air or knocks sea creatures out as they grow.

Some research groups and start-ups want to help accelerate this natural process by adding certain minerals to the oceans that could help them prevent more carbon and slower climate change. This idea has attracted a lot of enthusiasm and investment.

However, numerous recent studies suggest that some of these approaches may not be as effective as scientists had hoped.

That is disappointing news, as a recent report suggests that the world may need to limit its annual additional 10 billion tons of carbon to 2 degrees Celsius by the middle of the century. Read the full story.

– James Temple

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