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I'm going to be totally honest. I've been feeling pretty down about climate change lately.

It kind of felt like the Glasgow summit fizzled. There was the news that the key ice shelf

in Antarctica is melting faster than expected. Then there were the awful tornadoes over the

weekend. So when I read Clive Thompson's story about a potential solution to climate change,

or at least some technology that might be helpful, I was immediately hooked. Clive story,

which ran in Mother Jones, is about something called direct-air carbon capture or DAC.

Direct-air carbon capture is basically the art and science of extracting CO2 from the air.

Think of a giant vacuum, but for carbon. You create a machine that uses a chemical process

to bind CO2 and turn it into something that you can then store somewhere. Maybe a shove it

really deep in the ground. So it's gone. Maybe you turn it into something else that you can use.

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