The Bottom Line
Green Energy Guide: The Bottom Line
How do the various sources of electricity we have to choose from stack up when you look at all the issues overall? Here are EWG's ratings assessing how well each of the sources meet our criteria for sustainability on each issue. The ratings were based on a combination of quantitative and qualitative data. See Appendix and Environmental Impacts for more information on the qualitative components or our ratings.
Table 9. Rating the Sources: The Bottom Line
|Wind||Solar||Small Hydro||Large Hydro||Nat. Gas||Biomass||Coal||Nuclear|
|Air and Climate||10||10||10||10||2||6||1||7|
|Health and Safety||10||10||9||7||5||6||2||1|
|Energy Return Ratio||7||8||10||10||8||1||7||2|