Silver birch, elder, and yew win out in an experiment to see which species best capture the tiny particles from diesel pollution.

A study compares verbal and math test scores to air quality measurements in China and finds a correlation.

The sources of pollution are not known yet because of incomplete data collection.

Opponents of the guidelines, which would bar results of many public health studies from use in policy making, include scientific and healthcare organizations.

A new report estimates that 95 percent of people live in areas with dangerously high levels of fine particulate matter such as dust and soot.

Mineral nanoparticles similar to those that have been associated with Alzheimer’s disease may enter the brain through the inhalation of polluted air.

Air pollution is linked to 6.5 million premature deaths each year, according to a study.

The World Health Organization estimates that more than 7 million people died in 2012 due to air pollution, making it the number-one environmental risk on the planet.

Some 1,300 species of microbes, including some associated with allergies and lung disease, are adrift in Beijing’s thick smog.