21.   So what are greater congestion, higher accident rates, and worse air pollution compared to the freedom to drive?

22.   The air pollution gets so bad on some days that health advisories are posted at park entrances.

23.   The new air pollution controls are designed to limit harmful emissions from industry and motor vehicles.

24.   The problem of air pollution is especially serious in urban areas.

25.   There also is the obvious environmental benefits to biking, since it reduces air pollution and reduces traffic.

26.   There is growing public anxiety over levels of air pollution in our cities.

27.   There will be penalties if the government misses the deadline to cut air pollution.

28.   They can always find a disease organism somewhere as a way of dismissing the idea of air pollution.

29.   Those include reducing air pollution by two pounds every time some source adds one pound.

30.   Air pollution is a serious health hazard.