The direct health impacts of vehicle emissions, including diesel exhaust from cars and trucks, are a concern. Nitrogen oxides (NOx) contribute to smog, and smog contributes to more than 400,000 hospital visits each year for conditions related to asthma and respiratory and heart diseases - all of which have been linked to diesel exhaust.
Commitment to reducing total emissions from our engines today to the lowest possible levels is our responsibility as executives, as parents and as human beings.
Carbon, the DOT, and you, Fleet Owner
31 Areas Do Not Meet PM 2.5 Standards, Environmental Protection
Fleets Focus on Carbon-Emissions Reporting, Transport Topics
According to the Clean Air Task Force, more than 75% of all Americans live near urban areas where traffic congestion and concentrated sources of diesel exhaust create health problems.
 California Air Resource Board (CARB) - CARB 2003a, CARB 2005
 CARB 2000