Here's why air pollution levels often rise in summer and learn safe, practical tips for exercising when air quality is poor.

U.S. counties with hog and cattle feeding operations may be subject to higher air pollution levels, while lacking the health insurance necessary to treat related medical problems, a new study has ...

America’s national parks are beloved for their extraordinary landscapes and rich cultural and historical significance.

NASA's vivid simulation shows how sea salt, dust, smoke, and sulfates from pollution and volcanoes spread across thousands of ...

An interesting graphic produced by World Visualized ranks the nations with the worst air quality, measured by average ...