Kevin Trenberth

Superstorms and Climate Change

Hurricane Sandy grew over days to become a monster of a storm when it finally hit the East Coast. Climate scientists note that global warming likely contributed to the making of this "Frankenstorm."

California Burning

As California's wildfires die down, some argue development in parched areas of the US should be sharply curtailed. And climate experts say global warming helped exacerbate the destruction this year.