What Blue Carbon Actually Is

Blue carbon is the carbon held in mangroves, tidal marshes and seagrass meadows, in the plants and in the ground they grow in. How much a place holds, how fast it builds, and whether protecting it helps the climate are three separate questions.

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Split-level view of a mangrove forest, showing leafy branches above the water and tangled roots extending into clear coastal water below.
Photo by Kristin Hoel / Unsplash

Originally published . Substantially updated .