Cutting Emissions, the Roundabout Way, in New Hampshire
This means each vehicle spends less time pumping out planet-warming pollutants, like carbon dioxide. Installing roundabouts also improved Keene’s air quality, which used to rank among the worst in New England. In a study published in 2018, a former Keene city planner found soot & other small airborne particulates, which can be harmful to human health, had fallen by up to 40 percent