Notes on The Great Acceleration, by JR McNeil and Peter Engelke

"One can find reasons, as this book does, to prefer a more recent date for the beginning of the Anthropocene. Those reasons, in brief, are, first, that since the mid-twentieth century human action (unintentionally) has become the most important factor governing crucial biogeochemical cycles, to wit, the carbon cycle, the sulfur cycle, and the nitrogen [...]