Nature is a delicate balancing act, says Bill Nye the Science Guy. It's important we understand that the same system making Earth warm enough to live on is also driving climate change. According to Nye, scientists understand energy emanating from the sun in two distinct ways: as photons and waves.
When you measure sunlight as waves, you notice that wavelengths of sunlight are shorter when they enter the Earth's atmosphere, and grow in length when they try to leave, after being irradiated by Earth objects: soil, ice, concrete, office buildings, etc. Herein lies the primary mechanism of climate change: atmospheric gases like carbon dioxide and methane prevent longer-wave light from passing through, thus becoming trapped inside Earth's atmosphere. These so-called greenhouse gases trap light only when it tries to exit the Earth.
Bill Nye is a strong advocate for climate change awareness. He has publicly encouraged candidates for office to confront the science behind climate change and petitioned the media to ask candidates about their position on human-caused warming. Nye is the author of Undeniable: Evolution and the Science of Creation.