Mankind's greatest achievements have come about by talking and its greatest failures by not talking. It doesn’t have to be like this.

We've created life in our own image.

Real science can be far stranger than science fiction and much more satisfying.

One can see from space how the human race has changed the Earth. Nearly all of the available land has been cleared of forest and is now used for agriculture or urban development. The polar icecaps are shrinking and the desert areas are increasing. At night, the Earth is no longer dark, but large areas are lit up. All of this is evidence that human exploitation of the planet is reaching a critical limit. But human demands and expectations are ever-increasing. We cannot continue to pollute the atmosphere, poison the ocean and exhaust the land. There isn't any more available.

I wouldnt be here today if it were not for the NHS, I have received a large amount of high-quality treatment without which I would not have survived.

If it were only a few degrees, that would be serious, but we could adapt to it. But the danger is the warming process might be unstable and run away. We could end up like Venus, covered in clouds and with the surface temperature of 400 degrees. It could be too late if we wait until the bad effects of warming become obvious. We need action now to reduce emission of carbon dioxide.

We are all now connected by the Internet, like neurons in a giant brain.