Flush Lightly, America

Get beyond the unfortunate imagery of a "green toilet," and you have a water-saving solution that kicks back some cash too.

Bath-and-kitchen giant Kohler Co. launched an online campaign to teach homeowners how to help the environment by installing water-saving toilets and fixtures.

Far from a passive potty-peddler, Kohler committed to donating $1 worth of product to Habitat for Humanity for every three-question quiz completed on their site, which could equal a pledge of up to $1 million worth of water-saving plumbing products given to low-income members of communities.

Check out the interactive map to learn to what extent your hometown rewards water conservation. Installing a low-flow commode can earn a rebate of up to $125 in Denver, $165 in L.A., and $240 in NYC.

--Jordana Fyne