Seagrasses and mangroves can suck carbon from the air (by Economist)

... seagrass is more than just a biological curiosity. Along with two other kinds of coastal ecosystem—mangrove swamps and tidal marshes—seagrass meadows are particularly good at taking carbon dioxide from the air and converting it into plant matter. That makes all three ecosystems important for efforts to control climate change.

Read more https://www.economist.com/science-and-technology/2021/03/06/seagrasses-and-mangroves-can-suck-carbon-from-the-air