This article was a lot more positive than the last post on here, and it talks about using nature-focused methods to cut down on carbon emissions in cities. One example it uses is Hong Kong's oyster farms, in which city officials have employed the use of oysters, which can each filter up to 200 liters of water a day, to help improve their water quality and revive the species. It lists many different examples from all over world and says that we are moving in the right direction, just not fast enough.
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