We do.
Solaaaaarrrrr. But it doesn't generate nearly enough energy, and it's chancy due to the atmosphere and weather. Solar panels are also moderately expensive in the first place.
If this fusion project works, we'll be in the clear as far as energy.
[youtube]http://www.youtube.com/watch?v=d8h5ZuPQWZw[/youtube]
Pay no mind to thith manth lithp.