By clean energy, I mean forms of energy such as solar, nuclear, hydroelectric, etc. And by mainstream, I mean providing at least fifty percent of all the energy. I’m just curious as to what other people who may know more about this issue than me think. I assume it won’t be at least for 40 or 50 years since we, or at least America, is way too slow and lazy to make an extremely beneficial change such as switching to clean energy. What do you all think?