Throughout history, religious wars have always been the most brutal and cruel and merciless.

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 saw the logarithmic growth of computer power.

We face a climate crisis now that is the most serious challenge our civilization has ever confronted. And the greatest country in the world [America] has to remain a part of this unprecedented global agreement to deal with it.

The existence of the EPA regulation will require large carbon polluters to look at their hole cards, and some of them have decided that they much prefer legislation.

The cost reductions for renewable energy continue downward in a very dramatic way. We're in the early stages of a sustainability revolution in the globe that has the scale of the industrial revolution but the speed of the digital revolution. And you see it with renewable energy and you see it with LED lighting, which takes a fraction of the energy for the existing bulbs. All new lights are going to be LED. Electric vehicles. There are a lot of changes underway right now. I'm excited by the prospect, and I look forward to working in the months and years to come to accelerate this transition.

When fear displaces reason, the result is often irrational hatred and division.