'Goals' and 'caps' on carbon emissions are practically worthless, if coal emissions continue, because of the exceedingly long lifetime of carbon dioxide in the air.

I was lucky to grow up at a time when it was not difficult for the child of a tenant farmer to make his way to the state university.

The United States did not sign Kyoto, yet its emissions are not that different from the countries that did sign it.

We cannot afford to put off change any longer. We have to get on a new path within this new administration. We have only four years left for Obama to set an example to the rest of the world. America must take the lead.

Jail threats did not dissuade Martin Luther King - and intergenerational justice is a moral issue of comparable magnitude to civil rights.

A level of no more than 350 ppm is still feasible, with the help of reforestation and improved agricultural practices, but just barely - time is running out.

Coal is the single greatest threat to civilization and all life on our planet.