when it comes to renewable energy, i prefer the smaller project to the global scale project like dams (hydroelectric). so many wonderful areas of this planet are capped due to a hydroelectric dam. societies have died due to hydroelectric. if i bought into a green power system, i would look exclusively for either an all solar, biomass, or wind driven turbine to reduce the dam destruction. i also like natural gas as the fossil fuel over coal or oil. nuclear is also very good, but in light of 9-11 and other events, maybe it’s not the best 22nd century energy source.