MADISON, Wis. -- A comprehensive Auto Trader study declared Madison, Wisconsin as the city with the lowest levels of air ...

Record-high air pollution in Pakistan’s cultural capital of Lahore is sending more people to hospitals and private clinics and the city authorities warned a complete lockdown could be imminent if resi ...

If you walked the streets of Pittsburgh’s Strip District in 1924 at noon, you may have needed a lamp to cut through the thick ...