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

Climate change is new and complex. We don't have all the answers.

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.

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.

Political parties often take advantage of denial and fear in a moment of change. This is a well understood phenomenon that often leads to scapegoat-ism: blaming outsiders, such as immigrants, or racial and religious minorities. The phenomenon is behind Brexit and the violence in the political cycles in the US and EU.

The consensus is that climate change ranks along with nuclear warfare as the top two risks facing human civilization.

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