More than half of the US population lives amid potentially dangerous air pollution, with national efforts to improve air quality at risk of being reversed, a new report has warned.

Millions of people in Mexico City are choking on the worst air quality in 14 years, as cars and trucks add to the pollution with their outdated emissions controls.

Data published by the town hall here on Tuesday shows the Spanish capital registered levels of pollution above those fixed by the World Health Organization (WHO) for "all primary contaminants" exce

Authorities in Mexico City have temporarily ordered all cars to remain idle one day a week in response to this notoriously smoggy capital’s worst air-quality crisis in over a decade.

Mexico City's government ordered traffic restrictions on Tuesday and recommended people stay indoors due to serious air pollution, issuing its second-highest alert warning for ozone levels for the

Adults with long-term exposure to ozone (O3) face an increased risk of dying from respiratory and cardiovascular diseases, a study “Long-Term Ozone Exposure and Mortality in a Large Prospective St

Having announced another round of odd-even driving in April, the Delhi government has to gird itself for a crucial test.

Beijing recorded 46 days of heavy pollution during 2015, accounting for 12.6 percent of the year, the Ministry of Environmental Protection (MEP) announced on Tuesday.