The entire range of living matter on Earth from whales to viruses and from oaks to algae could be regarded as constituting a single living entity capable of maintaining the Earth's atmosphere to suit its overall needs and endowed with faculties and powers far beyond those of its constituent parts.

We rushed into renewable energy without any thought. The schemes are largely hopelessly inefficient and unpleasant. I personally can't stand windmills at any price.

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.

Let's make hay while it lasts.

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

The inertia of humans is so huge that you can't really do anything meaningful.

I have a feeling that climate change may be an issue as severe as a war. It may be necessary to put democracy on hold for a while.