You want to get something done with "renewable" energy? You feed tens of thousands of people with food culled from the land, and tell them "we want three huge pyramids right there, in a nice straight line." So they eat the food culled from the land that was fertilized with the shit from their parents, friends and neighbors, which came from the sun which fed the plants which fed the animals that fed the thousands of people that culled the food from the land that was then fed to the children...ETCETERA.