I saw the logarithmic growth of computer power.

A lot in the faith-based community, a lot of fundamentalist groups are - are now saying, you know, the Earth is the lord and the fullness there of, and we have an obligation to be good stewards of the planet.

It should be lifted above partisanship because it's a question of survival. It's a moral issue.

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.

The answer is to end our reliance on carbon-based fuels... If we succeed, we create booming new industries, wealth, clean secure energy and maybe we prevent the greatest disaster so far in human history, saving millions of lives while improving billions more. If we fail, basically it's business as usual while things slowly get worse all around us.

I've been dreaming of this moment since I was a kid growing up in Tennessee: that one day, I'd have the chance to come here to Madison Square Garden and be the warm-up act for Elvis.

The role of campaign contributions in our political system and the role of lobbyists have now reached levels that are quite unhealthy for the operations of our democracy. But the antidote, as in past eras of lobbyist excess, is for more involvement by citizens to build pressure on members of the House and Senate to serve the public interest.