We are in the midst of the 6th largest extinction event in the history of the plant and the first caused by human action.

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

After denial comes anger and finally, acceptance.

Technology is a many-headed monster and perhaps it would be better to regress to a safer past and avoid technological change; it is tempting to think like that.

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

Changing an economic system that is bent on uncontrolled and poorly measured economic growth and depends on fossil energy for its main objectives, is much more difficult than changing how nuclear energy is used for military purposes. Some think it may be impossible.

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