Where is the element carbon stored in the largest quantities on Earth?
Quick Answer
The largest carbon reservoirs are in rocks, especially carbonate rocks, and in the oceans. Fossil fuels and living organisms store much less carbon than Earth’s crust and oceans.
The Full Story
Most of Earth’s carbon is stored long-term in sedimentary rocks, especially carbonate rocks such as limestone and dolomite. The oceans also hold a huge amount of carbon, dissolved mainly as bicarbonate and carbonate ions. By comparison, the atmosphere, living biomass, and fossil fuels contain much smaller amounts. Carbon moves slowly between these reservoirs through weathering, ocean chemistry, volcanism, and the carbon cycle. Understanding where carbon is stored is central to climate science and geochemistry.
Key Facts
YouTube Angle
Suggested video title for this topic:
"Most of Earth’s carbon isn’t in the air—it’s locked away in rock and water."
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