• A new air-conditioning system manages without nasty gases https://www.economist.com/science-and-technology/2021/07/21/a-new-green-air-conditioning-system-manages-without-nasty-gases 63 comments 23/7/2021
• A new, green air-conditioning system manages without nasty gases https://www.economist.com/science-and-technology/2021/07/21/a-new-green-air-conditioning-system-manages-without-nasty-gases 2 comments 22/7/2021

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