With no federal mandates to protect air and water, pollution levels were catastrophic, creating dangerous living conditions for residents. Here are vintage photos that reveal the grim reality of ...

People's ability to interpret emotions or focus on performing a task is reduced by short-term exposure to particulate matter (PM) air pollution, potentially making everyday activities, such as the ...

The pollution level entered the 'severe' category for the first time this season on Wednesday, with the Air Quality Index (AQI) spiking to 429â a sharp rise from Tuesday's 24-hour average of 334.