51.   But when asked about the importance of clean air or clean water, voters rate the issue just as high as health care and nearly as high as education.

52.   Clean air advocates and government officials familiar with the findings of the report praised it.

53.   Clean air standards might well play a part in its success, with cities having to reduce auto emissions or risk losing highway funding.

54.   Clean air allows you to sleep and breathe easier.

55.   Clean air and clean water are equally important.

56.   Clean air has its price, however.

57.   Clean air proposals in recent years have ranged from spraying water over the city from airplanes to boring a hole in the surrounding foothills to allow pollution to escape.

58.   Clean air and a healthy economy are more than a catchy slogan.

59.   Colorado officials attribute their recent clean air record to tighter restrictions on cars and trucks.

60.   Clean air and breast-feeding are the kinds of issues that have been drowned in the past by tidal waves of political rage.