Carol and her husband, Mark, live in Cobb County. Carol drops Mark at Delta Air Lines in Hapeville and then continues to Clayton State. They travel almost 40 miles a day one-way. The Clean Air Campaign’s web site calculates that the cost to drive alone for Carol would be $563 a month. However, by just driving one vehicle, Carol and Mark are saving approximately $282 a month or $3,384 a year. A vehicle will produce about 0.7 grams of ozone causing pollution per mile: Carol and Mark saved about 1 pound of ozone causing pollution per month.