This $500 shirt changes color when exposed to air pollution – but who does it help?

A NYC-based designer says he wants to make people pay more attention to the environment. But at these prices, is this more art than activism?

Outdoor air pollution has grown by 8% around the world in the last five years, according to new data by the World Health Organization. Some of the world's biggest cities have significantly high pollution levels.

Take New York, for example. A recent NYU study looked at the health of 300,000 residents and concluded that individuals living in zipcodes with higher concentrations of pollution - as measured by the Environmental Protection Agency - had a 24% higher chance of having artery constriction.