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America Has Lost a Third of Its Topsoil
https://www.pnas.org/content/118/8/e1922375118
11 comments
20/4/2021
science
America's Corn Belt Has Lost a Third of Its Topsoil
https://www.smithsonianmag.com/science-nature/scientists-say-nations-corn-belt-has-lost-third-its-topsoil-180977485/
249 comments
19/4/2021
science