Mangrove in Australia, photo: Richard Taylor/Creative Commons.
We've known that the world's mangroves are in decline, with 30-50% of them being cleared in the past half century and 16% of them currently threatened. Now new research shows that mangroves are the most carbon-rich forests in the tropics, clearing them being responsible for about 10% of greenhouse gas emissions from global deforestation despite being just 0.7% of tropical forest area. 
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