I don't think we have very good records about what they were thinking except, as I pointed out earlier today, that they did invent our political system.

Even if you build the perfect reactor, you're still saddled with a people problem and an equipment problem.

The more we pour the big machines, the fuel, the pesticides, the herbicides, the fertilizer and chemicals into farming, the more we knock out the mechanism that made it all work in the first place.

There are many different kinds of radioactive waste and each has its own half-life so, just to be on the safe side and to simplify matters, I base my calculations on the worst one and that's plutonium.

Perhaps we'll realize that each of us has not one vote but ten thousand or a million.

For how many people do you think might yet stand on this planet before the sun grows cold? That's the responsibility we hold in our hands.

The wild places are where we began. When they end, so do we.