HNGN: Scientists found carbon in soil that covered the Earth thousands of years ago.
These soils could contribute to global climate change if disturbed through "erosion, agriculture, deforestation, mining and other human activities," a University of Wisconsin-Madison news release reported.
"There is a lot of carbon at depths where nobody is measuring," Erika Marin-Spiotta, a University of Wisconsin-Madison assistant professor of geography and the lead author of the new study, said in the news release....