When energy prices go up, the difficulty of projecting demand also goes up - uncertainty goes up.

We're operating this planet like a business in liquidation.

Now we have things that are obviously false, leading us to war, leading us to deny people health care, leading us to ignore the climate crisis. We have to restore the integrity of the democratic conversation.

When you have the facts on your side, argue the facts. When you have the law on your side, argue the law. When you have neither, holler.

I understand that being optimistic in this age is challenging, but I am optimistic nonetheless.

I take no pleasure in the fact that the scientific predictions I’ve relayed to popular audiences turn out to be true.

We now face the prospect of a kind of global civil war between those who refuse to consider the consequences of civilization's relentless advance and those who refuse to be silent partners in the destruction. More and more people of conscience are joining the effort to resist, but the time has come to make this struggle the central organizing principle of world civilizations.