Andy Coghlan writes in New Scientist magazine about a marvelous way to clean up carbon dioxide?turn it into diamonds. “We are changing a waste gas into gems,” says Chinese researcher Qianwang Chen.

It’s even cheaper than the current method of creating manmade diamonds, which requires up five million atmospheres of pressure and ultra-high temperatures. Chen makes diamonds in only 12 hours by reacting CO2 with metallic sodium in a pressurized oven at a lower temperature and pressure.
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