Almost half of the children in New Delhi are suffering irreversible lung damage because of the toxic levels of air pollution in the city. A number of factors make children particularly vulnerable to air pollution. They have lower immunity than adults and their respirtory tracts are easier for pollutnants to penetrate. Also particulate matter is concentrated…

America’s obesity crisis is creating a new concern to make healthy cities, though the rhetoric outstrips the plans. A recent blog on a health website says that more than half of U.S. adults don’t meet the recommended daily requirements for aerobic exercise or physical activity. It makes the case for better planning and design to…