Feedbacks upon feedbacks: Rock weathering and the climate

According to Ars Technica, rock weathering plays a dual role in Earth's climate. When rocks weather chemically, they can draw down carbon dioxide from the atmosphere. But depending on the rock type, that same process can also release carbon dioxide. Scientists are finding that understanding which rocks warm and which cool the planet is crucial to predicting Earth's long-term climate future—a reminder that climate feedback loops run deep, literally through the planet's own geology.

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