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Scientist Discover How to Convert CO2 into Powder That Can Be Stored for Decades
(www.scientificamerican.com)
Everything about energy production and storage.
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Yes, it's possible to improve efficiency, up to a limit set by thermodynamics. In this video, a scientist (granted, astrophysicist) talks about it: https://www.youtube.com/watch?v=EBN9JeX3iDs
While capture is necessary, it will physically not suffice. We have to stop emitting more; keep fossil fuels in the ground.
Preventative medicine for the Earth basically