big part of the problem from ozone. we ve got lots of sources. and many of us are adding to that problem when we choose to drive instead of take public transit or turn on electricity when we should be saving the power. those are the things that can make a big difference in pollution. one of the things i was fascinating by was for the very first time you looked at soc socioeconomic groups in terms of this pollution. what did you find? we know from a lot of different research that people who have low income have much higher risk of pollution. and so we looked and found millions of people in communities around the country who have low income and because of where they live or because of their diseases may be at higher risk for breathing the pollution we have. some of those people are the ones who can least afford medical treatment for their problems, as well. absolutely. janice nolen from the american lung association, thanks for stopping by to talk about your report. thank you