Well, a reasonably clean source of electricity is Hydro (dams); however in many cases dams play havoc on spawning cycles, ie salmon....

Why can't they utilize tidal differences, I know there are many test projects out there, and cost is a factor....but so are building large hydro-electric dams.

And yes, we are a large producer of oil cat, so why the H am I paying 6 bucks a gallon!!!...I think I am going to go Nigerian and hack a hole in that pileline running south and get me some of my own