With no federal mandates to protect air and water, pollution levels were catastrophic, creating dangerous living conditions for residents. Here are vintage photos that reveal the grim reality of ...

Air pollution causes some 8.8 million deaths annually ... we've compiled some of the most beautiful — and heartbreaking — images of our planet and its flora and fauna. Here are 30 images ...

In the drive to build smarter cities around the world, what is the most important thing we should do to tackle air pollution? Chokingly thick blankets of smog are often a byproduct of economic ...