Energy is a global thing that most everyone in America uses, but its production is not eco friendly. Nuclear power plants have, in the past, done serious harm to the world. Take the meltdown in Fukushima for instance, it caused a full city of people to move out of their homes because of the radiation expelled. If we weren't still creating electricity in harmful ways like this then, we could probably have a cleaner environment than we do now.
In my Science class our teacher showed us this video of these people creating a device that created electrical energy. This is called the Soccket ball. It is basically a soccer ball that when kicked it takes the mechanical energy from the kick and transfers it into electrical energy. So, you have to actually work for your energy instead of harmfully receiving it from someone else.