Trenberth: "you look out the window and you see climate change in action"

What's Causing Unusually Hot Temperatures in U.S.? | PBS NewsHour | July 2, 2012 | PBS

KEVIN TRENBERTH: Well, I think it's -- you know, you look out the window and you see climate change in action. This is the way it gets manifested. There's normal weather events. There's the normal seasons.
If we have June temperatures in March, well, you know, we have experienced them before because we get them in June. If we have a very mild winter, actually, people like that, because the winter isn't as cold. But we were breaking records then.
Now we're breaking records, but we're in the peak of the heat season. And now we're going outside of the realm of conditions previously experienced.