Check out what the above 2 grad students from NYU came up with - a high tech sweatshirt emblazoned with pink lungs that will show blue veins when exposed to dirty air. A small carbon dioxide sensor attached to the sweatshirt can pick up pollution from cars factories and second hand smoke.
We need this in a t shirt form here in Singapore though (too hot for sweatshirts).
Read this link for the full story
http://www.nydailynews.com/ny_local/2011/01/19/2011-01-19_grad_students_create_colorchanging_clothes_that_detect_foul_air_shirts_act_as_to.html.
