If we keep pulling death from the ground, we will reap death from the skies.

There would be a cost for dumping carbon into our atmosphere and a cap on total emissions. The government must make a clear and firm decision - terminating the idea in our society it is free to pump infinite amounts of carbon into the air. Once that happens, private capital will flow even more aggressively into developing and deploying the alternative, less-polluting technologies.

Clean coal represents a breakthrough in the marketing of coal, but not in the science of burning coal.

I think we have every reason to hope for the best but expect and prepare for the worst.

To make sure we aren't training people for jobs that don't exist, the government should provide companies with loans or loan guarantees. And the government should also directly employ people to do things like coastal restoration, land restoration, reforestation and similar programs that absorb carbon and protect America's beauty.

Reversing global warming will take a World War II level of mobilization. It is the work of tens of millions, not hundreds of thousands.

Now, we can live in this little, liberal bubble bath where everybody's supposed to like everybody and do all this stuff and understand our pain and know our history. But that, maybe, works in your dorm, that doesn't work in the real world, and people need to get out of all that.