I haven't seen this pic before. I wonder if it's photoshoped

-Stefan

http://www.ananova.com/news/story/sm_860540.html?menu=news.quirkies

European scientists have devised a paint that soaks up nitrogen oxide gases emitted by vehicle exhausts, a pollution source that can cause smog and respiratory problems.
http://www.smh.com.au/articles/2004/02/05/1075853967536.html