Despite our very recent appearance on the planet, humanity combines arrogance with increasing material demands, even as we become more numerous. Our toughness is a delusion. Have we the intelligence and discipline to vigilantly guard against our tendency to grow without limit?

My work more than didn't fit in. It crossed willy-nilly the boundaries that people had spent their lives building up. It hits some 30 subfields of biology, even geology.

People think the earth is going to die and they have to save it. That's ridiculous. If you rid the earth of flowering plants, people would die, period. But the earth was without flowering plants for almost all of its history.

There is no scientific reason to think that we, even with space travel, are going to survive as a species for ever, certainly not by biting off the hand that feeds us, which is exactly what we are doing.

The Conservatives are a confusing lot. They first denied climate change was a serious issue and then suggested strengthening the nuclear industry as a solution to it. They oppose the European Union, but support joining North American Free Trade Agreement, despite its obvious failure.

We're adding a billion people every decade. We're just spin doctors. Whatever we do is supposedly great, and yet it's always at the expense of diversity and nature. We're like elephants. The ecology of the elephant is more similar to human than any other.

Economic growth and environmental protection are not at odds. They're opposite sides of the same coin if you're looking at longer-term prosperity.

I have talked to people across the country struggling in the face of an altered climate. New Jersey homeowners are trying to rebuild after Superstorm Sandy. Miami government officials are trying to plan for rising seas and flooded streets. California farmers are trying to make it through the state's worst drought on record.