Ninety-seven percent of participants of the Green Your Home Challenge said it increased their knowledge of how to help the environment. The tale of one online game serves as a powerful example of how approaching old problems in new ways can bring about significant changes – in a relatively short space of time. The Green Your Home Challenge, a month-long game run by Recyclebank <http://www.recyclebank.com/>  in April last year, was highly successful in getting people to adopt more eco-friendly habits, simply by framing their actions in a gaming environment.