Cities in California make up a significant proportion of the country's most polluted metropolitan areas when it comes to air ...

Two-year-old Sumaiya Ansari, a resident of India's Byrnihat town which is ranked the world's most polluted metropolitan area ...

The American Lung Association has released its annual “State of the Air” report and several major cities are among the worst ...

The report then ranks the most polluted and cleanest U.S. cities based on an area’s number of unhealthy air days and the city’s particulate pollution. This year’s report looked at a three ...

The industrial town, located on the Assam-Meghalaya border, was ranked the world’s most polluted metropolitan ... Unlike Delhi and other major Indian cities where pollution typically spikes ...

The report then ranks the most polluted and cleanest U.S. cities based on an area’s number of unhealthy air days and the city’s particulate pollution. This year’s report looked at a three ...