Those who fail to see that population growth and climate change are two sides of the same coin are either ignorant or hiding from the truth. These two huge environmental problems are inseparable and to discuss one while ignoring the other is irrational.

China will soon emit more greenhouse gases than America, but its regime knows if it caps aspirations there will be a revolution.

If we gave up eating beef we would have roughly 20 to 30 times more land for food than we have now.

I suspect any worries about genetic engineering may be unnecessary. Genetic mutations have always happened naturally, anyway.

I have heard that the Saudi Arabians are paying Greenpeace to campaign against Nuclear Power. It wouldn't surprise me at all.

We are the intelligent elite among animal life on earth and whatever our mistakes, [Earth] needs us. This may seem an odd statement after all that I have said about the way 20th century humans became almost a planetary disease organism. But it has taken [Earth] 2.5 billion years to evolve an animal that can think and communicate its thoughts. If we become extinct she has little chance of evolving another.

I'm not a pessimist, even though I do think awful things are going to happen.