Summary:
- The article discusses a new study that has found evidence of a massive underground reservoir of molten carbon beneath the western United States.
- This reservoir is estimated to be roughly 217 miles wide and located about 100 miles beneath the surface, containing enough carbon to significantly impact the global carbon cycle.
- The discovery of this large carbon reservoir provides important insights into the Earth's deep carbon cycle and could have implications for our understanding of climate change and the planet's geological processes.