Solar power is one of the most hopeful technologies but still produces about 0.01 percent of U.S. electricity. The U.S. allocates just $159 million for solar research per year - about what we spend in Iraq every nine hours.

There are other issues I have felt more emotionally connected to, like China, where I lived and worked for some time. I was living there when Tiananmen Square erupted

The news media's silence, particularly television news, is reprehensible.

I think that [Donald] Trump is frankly a bigot. He has a racist history.

If President Bush is serious about genocide, an immediate priority is to stop the cancer of Darfur from spreading further, which means working with France to shore up Chad and the Central African Republic.

It’s time for a 21st-century abolitionist movement in the U.S and around the world.

The fact that people will pay you to talk to people and travel to interesting places and write about what intrigues you, I am just amazed by that.