Dear EarthTalk: Every day when I pick up my kids at school, all the parents wait in their cars with the engines running. Is all this idling a significant contributor to the atmosphere’s carbon burden or am I being a worry wart over nothing? — Mary B., Burlington, Vermont
Idling is indeed a scourge on the environment, given the noxious emissions coming out of our engines. According to the U.S. Department of Energy (DoE), a single vehicle dropping off and picking up a kid at school each day adds three pounds of air pollution to the atmosphere per month from idling. The 250 million personal vehicles on the road in the U.S. alone generate about 30 million tons of carbon dioxide every year just by idling. DoE reports that eliminating unnecessary idling by personal vehicles would be equivalent in emissions reductions to taking five million vehicles off the road.