ACT-Responsible organizes the work of advertisers promoting sustainable causes into three categories: Taking care of (1) the planet, (2) yourself, and (3) others. But their own work, provocatively depicting the tragic consequences of our choices on future generations, deserves to lead this slideshow on the coolest environmental advertising. The poster promoted ACT Reponsible’s exhibition last week at Cannes 2009. According to Creative Director Fred Claviere, it was a hard choice to use an image this provocative. But in his own words: “We have to make people react…it was simply too urgent to not use it.”