Salt marshes to absorb carbon to 2050, but emit it later

Reuters: Salt marshes around the world's coasts will help slow climate change until about 2050 by soaking up greenhouse gases but then risk making the problem even worse as sea levels rise, a study showed on Wednesday. Plants such as grasses and shrubs - which thrive in salt marshes found from India to the United States - absorb heat-trapping carbon from the air. Much of it then ends up buried in sediment where it no longer stokes global warming. "The net impact of temperature warming and sea level......

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