Trust your intuition and be resilient. If you have real breakout ideas, even your friends will laugh at you secretly until you can prove their viability.

I have many sources of inspiration. I'd have to point to Dr. Martin Luther King, first and foremost. But my parents were good, hardworking folks who kept us in the church and the public schools, and out of trouble, for the most part.

You don't get fewer followers saying outrageous stuff on Twitter.

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

The people who seem to us to be a very tiny elite, far off and mysterious, actually live in a fairly big world. The way they look at the planet is like they're looking at an index card covered in supply routes. We protestors had imagined ourselves this huge threat. But we were at best bemusing. To the extent that the people inside did care, it was almost like we were paying them a compliment-it reinforced their sense of power.

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.

We seem to forget that everything that is good for the environment is a job. Solar panels don't put themselves up. Wind turbines don't manufacture themselves. Houses don't retrofit themselves and put in their own new boilers and furnaces and better-fitting windows and doors. Advanced biofuel crops don't plant themselves. Community gardens don't tend themselves. Farmers' markets don't run themselves. Every single thing that is good for the environment is actually a job, a contract, or an entrepreneurial opportunity.