Parts of India, including the capital Delhi, were once again covered in thick smog recently as toxic pollution from industry and crop-burning engulfed the region. Even though India’s National Clean ...

A new interactive map and groundbreaking database allows people in the world’s largest metropolitan areas to track their air pollution exposure, along with their region’s biggest sources of ...

I grew up in rural Colorado, deep in the mountains, and I can still remember the first time I visited Denver in the early 2000s. The city sits on the plain, skyscrapers rising and buildings extending ...