The new markets that arise from ecological constraints will dominate the 21st century economy, and so will markets for knowledge.

Signs of a poorly understood but treatable house fire requires action, not inaction.

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

Even if we planted a tree on every square yard available in the planet by the end of the century we would only capture at most 10 percent of the CO2 we need to reduce. This does not mean that we should not plant trees; we should, for biodiversity's sake, and for our long-term future together with the other species.

The new markets that arise from ecological constraints will dominate the 21st century economy, and so will markets for knowledge.

Trying to conserve a privileged global position makes change traumatic for the US.

Climate change is due to the use of energy for industrial growth, which has been and is overwhelmingly based on fossil fuels.