After denial comes anger and finally, acceptance.

The change in economic values created by the new markets for global public goods will reorient our global economy and under the right conditions can usher the satisfaction of basic needs of the present and of the future. This is what is needed right now.

If nuclear warfare is believed to be somewhat controlled, then climate change is now the greatest threat.

The sun is the source of all energy on planet Earth and we cannot experiment with our only energy source.

We have to remove the CO2 that the industrial economy has already emitted, which otherwise will remain in the atmosphere for hundreds of years and alter the Earth's climate irreversibly. It is possible to do this.

Geoengineering means changing the Earth's fundamental large-scale processes.

While denial leads to certainty, it is only the certainty of death. This is true for individuals and also for civilizations.