Well-established theories collapse under the weight of new facts and observations which cannot be explained, and then accumulate to the point where the once useful theory is clearly obsolete.

I smoked pot in college and in the Army.

The crisis is a concrete threatening reality today. It stands to get catastrophically worse unless we take action before the accumulation [of] this global warming pollution reaches such toxic levels that the problem becomes bigger than we can solve.

Consider what kind of car you get. Buy cars and other products that have the least impact environmentally.

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.

I think the cost of energy will come down when we make this transition to renewable energy.

Feb. 9, 1999 Dear Friend, Without your previous support, Bill Clinton and I would not have won our victories for the American people in 1992 and 1996. ... And to win in 2000, I need you by my side.