You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
The Union of Concerned Scientists created a web site where they compare electric cars pollution x gas-powered:
http://www.ucsusa.org/clean-vehicles/electric-vehicles/ev-emissions-tool#z/NATIONAL/_/_/_
I am surprised with Tesla's numbers...
Comments?