Ground-level ozone is of particular concern during hot, humid summer months. VOCs are emitted from most motor vehicles, gasoline, paints, cleaning solvents and some natural sources. NOx is a byproduct of combustion and is emitted from any combustion source such as fuel-burning motor vehicles, utility boilers, lawn care equipment and industrial equipment. Based on available data, NOx is the limiting factor in the formation of ozone in North Carolina because of the abundance of naturally occurring VOC's from trees, which cannot be controlled. However, as North Carolina's population continues to grow rapidly and vehicle-miles traveled increase exponentially, statewide Ozone levels are increasing, and many of North Carolina's urban areas are anticipated to be in violation of EPA smog levels early in the 21st century.
Ozone is especially hazardous to young children and elderly citizens.
However it also can aggravate asthma and cause breathing problems in healthy individuals at any age. These voluntary measures encourage citizens, businesses, and industries to help reduce emissions during potentially hazardous, high-level Ozone days. The N.C. Air Awareness Program is an education and outreach initiative that provides citizens, businesses and school children with information about air pollution, including its causes and effects, and efforts each citizen can make to help prevent it. During Ozone Action Days, alerts are broadcasted by local newspaper, television and radio media and by major employers. Use public transit, carpool, vanpool, walk or ride a bike to your destination.