Clean Up Your Advertising
A company in the Netherlands has created a novel new niche in outdoor advertising -- Green Graffiti. By using a simple template and a portable high pressure water sprayer, these guys can post your advertising message by cleaning away the dirt in order to leave your message in the area cleaned by the pressure wash.
In creating these messages, GreenGraffiti.nl uses no paper, no inks, no aggressive chemicals, and they are carbon neutral. In addition, their work actually CLEANS the environment and they donate a portion of their profits to local community organizations.