The climate, financial and national security crises are all connected. They share the same cause: Our [the USA's] absurd dependency on foreign oil. As long as we need to spend billions of dollars each year to buy foreign oil from state-run oil companies in the Persian Gulf, our problems of a trade deficit, a budget deficit and a climate crisis will persist.

I think that asserting that former President Obama wasn't born in the United States was just the height of irresponsibility, of course. And Donald Trump corrected that one. There are others that have yet to be corrected.

I doubt nuclear power will play a much larger role than it does now.

Politics has become a game of meaningless, mindless battles, conducted by unscrupulous methods and people, designed to transform even the most serious policy debates into sport.

We face the gravest threat that civilization has ever confronted. It's global in nature and requires a global solution. Increased CO2 emissions anywhere, whether from China or the United States or from one of the countries that is burning its forests like Brazil or Indonesia.

Each and every one of us can make changes in the way we live our lives and become part of the solution [to climate change]

The oil industry has outpaced the building of a public consensus of the implications of climate science.