The Ocean Absorbs 25% of Our CO₂ for Free. How Long Will It Last?

The ocean is humanity's greatest carbon capture machine — absorbing a quarter of all CO₂ emissions without charge. But warming and acidification are degrading this trillion-dollar service.

What the Ocean's Carbon Service Is Worth

If we had to pay for the CO₂ the ocean absorbs at current carbon market prices, the bill would be $3.3 trillion per year. It's the most undervalued ecosystem service on Earth — and America's coastal ecosystems play a central role.

America's Coastal "Blue Carbon" Ecosystems

US salt marshes, mangroves, and seagrass meadows store 50x more carbon per acre than tropical rainforests. These coastal ecosystems — threatened by development and warming — are America's hidden climate superweapon.

Warming Oceans Are Losing Their Carbon Capacity

As oceans warm, they become less able to absorb CO₂. Acidification simultaneously degrades the marine life that drives biological carbon uptake — a dangerous feedback loop that accelerates warming.

Investing in Ocean Carbon Is Climate ROI

Protecting and restoring coastal blue carbon ecosystems is among the most cost-effective climate investments available. The US can lead with blue carbon markets, coastal restoration funding, and ocean protection policy.

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