There's plenty we can learn about energy production from nature. Plants have about a four-billion-year head start on us for figuring out the best way to do it. The more we research and learn, the more options we'll have available to us.

At the same time, we cannot disregard what we already have. Nuclear power is eco-friendly, well-understood, well-regulated, and when operated within those regulations, completely safe. We have to find a good place to put the waste, but think of this-- if nuclear power plants had been built through the 1990s and today at the same rate as they were in the 1960s and 1970s, our greenhouse gas emissions would already be considerably lower than they are today.