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

Clean energy is hippy power. But its also cowboy power, it's rancher power, it's Appalachian power.

Now, here's a good question: should serious people focus on global political instability - terrorism, failing states, nuclear weapons - or should we focus on global climate instability - droughts, floods, extreme weather? Here's the correct answer: yes, both, because climate disruption will make every other national security problem worse.

A green economy begins to replace some of the clunking and chugging of ugly machines with the wise effort of beautiful, skilled people. That means more jobs.

I am sharing my faith with my sons. I pray, meditate and read devotionally. But let me be clear: I am a "person of faith" not because I am a saint, but because I am a sinner.

The time has come for a public-private community partnership to fix this country and put it back to work.

We need to think bigger, dream bigger, and get bigger.