James V. Hansen: “This tax gives a strong incentive to replace inefficient infrastructure.”

We have a planet in peril. The President recognizes this.

If we look at the history of the Earth, warming of more than one degree will surely make West Antarctic ice sheet unstable, and we will get sea level rise much more than one-and-a-half feet or three feet.

We cannot burn all of the fossil fuels without setting in motion a process of climate disruption that threatens the very existence of many species.

We must put a price, a rising price, on carbon emissions.