Global climate change is a big deal to me. We need to change our ways. - Bill Nye

Nye, a Cornell University graduate with a degree in mechanical engineering, studied under the late astronomer Carl Sagan.

He eventually quit his day job as an engineer to focus on comedy writing and performing. The decision led to the creation of 'Bill Nye the Science Guy,' which won 28 Emmys in five years. He also won seven national Emmy Awards for writing, performing and producing.

It will take more time for the change we have to effect, but we don't have more time. The carbon dioxide on Earth, just in the last four years, has increased from .03 percent to .04 percent. And the change will have a significant impact on everyone.