Ahead of the International Day of Clean Air, here’s a look at what causes air pollution, what it does to people and how the ...

The majority of agricultural land has air pollution levels above legal limits, threatening crop production. Air pollution exposure kills more than 350,000 people in Europe every year despite ...

Houston-area residents living near Sam Houston National Forest risk breathing in unhealthy pollution from the 2,000-acre wildfire ripping across the area, even as fire crews work hard to battle the ...