A joint initiative of The Climate Group, One Foundation and Hudong, the "Internet Forest" website (link in Chinese) invites visitors to answer 10 questions about their lifestyle. Their answers are converted to an equivalent number of trees planted, based on the estimated reduction in carbon emissions due to good habits such as using energy efficient light bulbs or eating less meat (I planted 0.08 trees today!). A link is also provided to a list of further suggestions on how to live a more environmentally friendly lifestyle.
This is a great example of an online public eduction campaign. It's fun and interactive, takes only a couple of minutes to complete, and teaches something at the same time.
The organizers are promoting the site via the media, and some online advertising. Of course, they can also hope for some "word of mouth" communication via channels such as instant messaging and blogs. The campaign runs from April to June, and the target is to plant the equivalent of a million trees.
