Dr. C's windmill set-up runs into some problems, when she realizes that it is producing electricity at such an accelerated rate. Mike uses what he learned from Phil's story of applying differently sized wheels to help her out.

How does nuclear energy work? Is radiation a risk? Find out the difference between nuclear fission and fusion, how uranium fuels the process, and the pros and cons of this alternative energy source.

There are many benefits to using renewable energy resources, but what is it exactly? From solar to wind, find out more about alternative energy, the fastest-growing source of energy in the world, and how we can use it to combat climate change.

Frustrated with electric bills, Homer decides to take his house off the power grid and generate power using wind energy. He quickly finds issues with its reliability.

Bill Nye explains how solar energy and solar panels work. He also quantifies the environmental benefits of using solar energy over fossil fuels.