I'm a scientist, not a theologian. I don't know if there is a God or not. Religion requires certainty.

You never know with politicians what they are really saying. And I don't say that in a negative way-they have an appalling job.

The big threat to the planet is people: there are too many, doing too well economically and burning too much oil.

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

It just so happens that the green religion is now taking over from the Christian religion. I don't think people have noticed that, but it's got all the sort of terms that religions use. The greens use guilt. That just shows how religious greens are. You can't win people round by saying they are guilty for putting (carbon dioxide) in the air.

If it hadn't been for the Cold War, neither Russia nor America would have been sending people into space.

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.