Hydropower is well established and can be further tapped. However, hydropower brings with it many social and environmental impacts. Of course, biomass burning creates greenhouse gas emissions. However, it is a renewable resource. If we grow the amount we burn, it is in principal a zero sum gain.
Power generated by wind depends on the cube of the wind speed.
Wind is intermittent. Environmental benefits of wind power in Colorado. Solar heat can be tapped to produce steam for the generation of electricity. Currently, solar technology installations is expensive- electricity produced by solar energy is 3 times as expensive as that produced by traditional means. Photovoltaic solar cells can provide local sources of energy.