The Danish design firm Diffus created a dress equipped with LED lights and a carbon dioxide detector that glows as the CO2 level rises. It's called the Climate Dress:
The embroidery becomes functional conveying electricity and computer information and thereby give "power to the dress". The dress senses the CO2 concentration in the air, then accordingly creates diverse light patterns varying from slow, regular light pulsations to short and hectic.[...]
The Climate Dress also contributes to the necessity of creating more awareness about environmental issues trough an esthetical representation of environmental data. Different light patterns are thereby staged as dramatic “micro events” embedded into clothes. They diligently and without concession tell us disturbing stories wrapped into a comfortable and reassuring cocoon de luxe.
http://www.diffus.dk/pollutiondress/intro.htm via Technabob | Image: Diffus