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Protecting mangroves to lock carbon away in trees may be an economic way to curb climate change, research suggests.

Carbon credit schemes already exist for rainforests; the new work suggests mangroves could be included too.

But other researchers say the economics depend on the global carbon price.

Presenting their results in Proceedings of the National Academy of Sciences (PNAS), the US-based team emphasises that protecting mangroves has important benefits for wildlife as well.