I saw the logarithmic growth of computer power.

The sooner we switch away from carbon-based fuel and start relying on renewable energy sources available in the United States, the sooner we will grow our economy by creating the millions of new jobs that will come from retrofitting homes and businesses, building smart grids, renewable energy systems and planting trees and all the rest. We need to create a lot of jobs that can't be outsourced.

I think George W. Bush has a warm, engaging personality. But, you know, the presidency is more than just a popularity contest.

I don't have the illusion that there's any position or role in the world with as much potential for bringing about change as that of president of the United States.

What we take for granted might not be here for our children.

The misconception that there is serious disagreement among scientists about global warming is actually an illusion that has been deliberately fostered by a relatively small but extremely well-funded cadre of special interests, including Exxon Mobil and a few other oil, coal, and utilities companies. These companies want to prevent any new policies that would interfere with their current business plans that rely on the massive unrestrained dumping of global warming pollution into the Earth's atmosphere every hour of every day.

I flew on Air Force Two for eight years, and now I have to take off my shoes to get on an aeroplane.