People band together online to date, discuss politics or lose weight. Now, according to the folks at Springwise, a US website called Greenopolis has created a community whose members help each other live in a more earth-friendly manner. After registering on Greenopolis, which is still in beta, visitors complete an online survey that analyses their daily activities to determine how ‘green’ their lifestyle is. Based on the survey findings users receive a coloured badge, which shows other members just how much of a friend to the earth they really are. Orange badge holders need to clean up their environmental act, and solid green badge holders are on the right track.

By participating on the site, users are awarded points, which are displayed for other members to see (sometimes, peer pressure can be used for good). More points—and corresponding changes in badge colour—show that they’re becoming more environmentally responsible. Plus, when the site officially debuts, points can be used to receive discounts on sustainable products. Greenopolis founders also want to make the badges portable, so that members can post them on their blogs and social network pages.