If there is no cost to be paid for the indiscriminate dumping of pollution into the earth's atmosphere, then it should be a surprise to no one that today we will dump another 70 million tons of global warming pollution into the thin shell of atmosphere surrounding our planet. ... We have to [act] this year, not next year. Mother Nature does not do bailouts.

The entire North Polar ice cap is disappearing before our very eyes. It's been the size of the continental United States for the last 3 million years and now 40 percent is gone and the rest of it is going.

Earlier in this century, the Heisenberg Principle established that the very act of observing a natural phenomenon can change what is being observed. Although the initial theory was limited in practice to special cases in subatomic physics, the philosophical implications were and are staggering.

In digital era, privacy must be a priority. Is it just me, or is secret blanket surveillance obscenely outrageous?

Now we have things that are obviously false, leading us to war, leading us to deny people health care, leading us to ignore the climate crisis. We have to restore the integrity of the democratic conversation.

In the age of the internet, with all of its problems, over time, the very fact that individuals can join the conversation creates the opportunity for the emergence of - for the re-emergence of a genuine conversation of democracy.

Judge Roberts is a brilliant lawyer, a brilliant judge. He is a very careful judge, a thoughtful judge. I would agree with what the President said earlier. He is a decent man. I think everybody who knows him likes him.