Some years back, a now-discredited report titled Dust to Dust made the intriguing claim that, in a well-to-wheels analysis, the Hummer H3 was more environmentally sound than the Toyota Prius.
New site RideNerd lets you pit just about any car versus another to find out which one has the green edge.
Beyond simply comparing fuel economy, RideNerd shows in-depth stats about each vehicle, including fresh water use and CO2 generation during manufacture.
The home page, at www.ridenerd.com, let me enter the cars to compare in two text boxes. A convenient look-up brought up a list of cars based on what I had typed. Below the entry boxes sit lists of type five cars by various categories and some pre-loaded comparisons, such as Dodge Dart vs. Honda Civic, VW Jetta TDI vs. VW Jetta Hybrid, and Lexus GS vs. Audi A7.
After hitting the compare button, the resulting page showed the cars' RideNerd scores, highlighting the best in green. The RideNerd score is derived from sub-categories scoring each car's affordability, fuel economy, impact on air quality, and how its manufacture and use affects climate change. A number of factors go into each of those sub-categories.