When will the Colorado River run dry?

The Hoover DamIn the 1960s I was taught geography at school by Mr H C Wilks. He was a car hating environmentalist who was never afraid to state his opinions in the geography class room. We encouraged him in this because it diverted him from teaching us. He forcefully held forth on pollution caused by cars, the spoiling of the countryside and the ways in which mankind had changed the surface of the earth, most of which he regarded as mere progress, rather than improvement. Continue reading