Here’s where Earth stores its carbon
"Over the last decade, researchers affiliated with the international Deep Carbon Observatory have taken inventory of where Earth keeps its carbon, and how carbon cycles throughout the planet. Although Earth’s carbon cycle has generally kept all but the tiniest bit of carbon stashed underground, asteroid impacts and massive volcanic eruptions have occasionally released catastrophic amounts of carbon into the atmosphere."
https://www.sciencenews.org/article/where-earth-stores-its-carbon
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