Top Renewable Energy Sources

This artcle from World Changing ranks the top renewable energy sources. 

Best to worst electric power sources:

1. Wind power 
2. concentrated solar power (CSP) 
3. geothermal power 
4. tidal power 
5. solar photovoltaics (PV) 
6. wave power 
7. hydroelectric power 
8. a tie between nuclear power and coal with carbon capture and sequestration (CCS)

Check out the entire article for more information.