The evidence for human-made climate change is overwhelming.

Some Democrats deserve to be criticized.

The evidence for human-made climate change is overwhelming.

If we fail to act, we will end up with a different planet.

Money has too big an influence on our politics in Washington and somehow we need to do something about that.

The most difficult task, phase-out over the next 20-25 years of coal use that does not capture CO₂, is Herculean, yet feasible when compared with the efforts that went into World War II. The stakes, for all life on the planet, surpass those of any previous crisis. The greatest danger is continued ignorance and denial, which could make tragic consequences unavoidable.

We are on the precipice of climate system tipping points beyond which there is no redemption.