It's a blessing to have work that feels fulfilling.

The scientific evidence of how serious this climate crisis is becoming continues to amass week after week after week.

The symbolism - and the substantive significance - of planting a tree has universal power in every culture and every society on Earth, and it is a way for individual men, women and children to participate in creating solutions for the environmental crisis.

We can build a collective civic space large enough for all our separate identities, that we can be E Pluribus Unum - Out of One, Many.

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.

Most people in politics draw energy from backslapping and shaking hands and all that. I draw energy from discussing ideas.

As I have said for many years throughout this land, we're borrowing money from China to buy oil from the Persian Gulf to burn it in ways that destroy the future of human civilization. Every bit of that has to change.