Let’s make hay while it lasts.

Civilization in its present form hasn’t got long.

Sadly, it’s much easier to create a desert than a forest.

Esso has been the main one in America spreading the disinformation that there is no global warming problem.

Geological change usually takes thousands of years to happen but we are seeing the climate changing not just in our lifetimes but also year by year.

All the modelling we do shows that the climate is poised on the jump up to a new hot state. It is accelerating so fast that you could say that we are already in it.

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

Science always uses metaphor.

There aren’t just bad people that commit genocide; we are all capable of it. It’s our evolutionary history.

Just after World War II, this country led the world in science by every way you could measure it, yet the number of scientists was a tiny proportion of what it is now.

The oil companies regard nuclear power as their rival, who will reduce their profits, so they put out a lot of disinformation about nuclear power.

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

You mustn’t take what I say as gospel because no one can second-guess the future.

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

There is little evidence that our individual intelligence has improved through recorded history.

Let’s make hay while it lasts.

A billion could live off the earth; 6 billion living as we do is far too many, and you run out of planet in no time.

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.

An inefficient virus kills its host. A clever virus stays with it.

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

Florida will be gone altogether, the whole damned place, in not too long.

NASA will send up a big sun shade that will be in orbit between the earth and sun and deflect 2 or 3 percent of the sunshine back into space. It would be cheaper than the international space station.

Nature favors those organisms which leave the environment in better shape for their progeny to survive.

For each of our actions there are only consequences.

I’ve got personal views on the ’60s. You can’t have freedom without paying the price for it.

Climatologists are all agreed that we’d be lucky to see the end of this century without the world being a totally different place, and being 8 or 9 degrees hotter on average.

Evolution is a tightly coupled dance, with life and the material environment as partners. From the dance emerges the entity Gaia.

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

We’d never have got a chance to go outside and look at the earth if it hadn’t been for space exploration and NASA.

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

Life does more than adapt to the Earth. It changes the Earth to its own purposes.

This programme to stop nuclear by 2020 is just crazy. If there were a nuclear war, and humanity were wiped out, the Earth would breathe a sigh of relief.

If you start any large theory, such as quantum mechanics, plate tectonics, evolution, it takes about 40 years for mainstream science to come around. Gaia has been going for only 30 years or so.

One pound of uranium is worth about 3 million pounds worth of coal or oil.