Change and Geoengineering the Planet : Climate Science & Geoengineering
April 13, 2013
“Each year humans shift ten times more rock and soil around the Earth than the great natural processes of erosion and weathering. Half of the land surface has been modified by humans. Dam-building since the 1930s has held back enough water to keep the oceans three centimeters lower than otherwise. Extinctions are now occurring at a rate