David Grinspoon Quote
We left Earth to its own devices for long enough, it would eventually enter another ice age. This would be much more extreme than the kinds of climate changes we are potentially facing now. During the last ice age, up until about thirteen thousand years ago, an unbroken sheet of ice two or three miles thick extended from the poles down to the latitude of Minneapolis. Sea level dropped by around three hundred feet, completely redrawing coastlines and the paths of rivers around the world. There is no way that a civilization of many billion humans, tied to cities and dependent upon a global system of agriculture and trade, could survive such a transition intact.
David Grinspoon
We left Earth to its own devices for long enough, it would eventually enter another ice age. This would be much more extreme than the kinds of climate changes we are potentially facing now. During the last ice age, up until about thirteen thousand years ago, an unbroken sheet of ice two or three miles thick extended from the poles down to the latitude of Minneapolis. Sea level dropped by around three hundred feet, completely redrawing coastlines and the paths of rivers around the world. There is no way that a civilization of many billion humans, tied to cities and dependent upon a global system of agriculture and trade, could survive such a transition intact.