The world's environment can no longer handle beef.

President Obama, I voted for him. I think he's a mature politician, but here's what happened. Obama wanted a green economy. He spent billions of dollars of tax money to create a green economy and it didn't happen. The question is why.

Being both entrepreneurial and social is no longer an oxymoron, but rather a tautology.

I wanted to make sure that this be the first scientific and technology revolution in history in which the public thoroughly discussed all the potential benefits and all the potential harms, in advance of the technology coming online and running its course.

If your corn has a herbicide-tolerant gene, it means you can pray your herbicides and kill the weeds; you won't kill your corn.

Solar and wind are now cheaper in many places than some fossil fuels and within the next two years, three, four, five years at the most. What the exponential curve does isn't going to go away. It is totally over for fossil fuels and nuclear. Nuclear's actually gone out.

The transition of world agriculture from food grain to feed grains represents an...evil whose consequences may be far greater and longer lasting than any past examples of violence inflicted by men against thier fellow human beings.