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Protecting coastal “blue carbon” ecosystems like mangroves, seagrasses and salt marshes is 10 times more effective at sequestering carbon per area than terrestrial forests, and is just one ocean-based solution that can help mitigate climate change. But lacking such action, an IPCC report estimated that climate-induced declines in ocean health will cost the global economy $428 billion by 2050 and $1.979 trillion by 2100.
