There's an app for air pollution

There's an app for air pollution
http://thechart.blogs.cnn.com/2012/01/30/epa-offers-free-apps/?hpt=he_c2
The Environmental Protection Agency (EPA) has a free app for
Apple and Android phones called AIRNow. The app gives
levels for ozone and particle pollution for more than 400 cities.
You can enter your zip code and the app will tell you if the
air quality is good, moderate, unhealthy for sensitive groups,
unhealthy, or hazardous. A color coded map of the entire
U.S. is also available with a forecast. You can also sign up for email
alerts from the EPA's EnviroFlash which allows you to
specify which city and what level of air quality you want to
be alerted about.
This is useful for people with heart or lung conditions, children
and elderly people. These groups are most sensitive to
particle pollution which mainly comes from car exhaust and
industry. I think this is especially helpful for parents when
they are trying to plan outdoor activities for their children or
to make sure to bring their inhalers when it's unhealthy
for sensitive groups. It would also be interesting to see which parts
of the country have the least amount of pollution.