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The Delicate Balance, Part 1: Technology is Not Always the Answer
02:00

The Delicate Balance, Part 1: Technology is Not Always the Answer

The Biosphere 2 experiment attempted to create a human engineered self sustaining environmental system. The experiment served to illustrate how little is understood about the workings of our natural ecosystems services.

Natural Ecosystem Services and the Economy
01:41

Natural Ecosystem Services and the Economy

Paul Ehrlich, best known for his work on population growth, talks about the critical links between Earth's natural ecosystems and what he calls the "human economy." If we did not have properly functioning natural ecosystems, Dr. Ehrlich argues, we w...

Natural Ecosystem Services and Waste Disposal
01:26

Natural Ecosystem Services and Waste Disposal

Paul Ehrlich, best known for his work on population growth, observes that there's no way to truly "throw things away," because everything remains on this planet. According to Dr. Ehrlich, we must depend on natural systems functioning properly if we ...

Biosphere II
01:58

Biosphere II

Paul Ehrlich, best known for his work on population growth, talks about Biosphere II and efforts to use technology to substitute for natural ecosystems (which he says are the most important part of our environment).