A new threat is here, and scientists say there's no way to stop it, as even remote parts of the world are seeing microplastic ...

In the 1970s, acid rain was one of the most serious environmental threats in North America and Europe. The air was so laden with pollution from coal power plants and cars at the time that it turned ...

Sources of soot include the burning of fossil fuels and fracking. Reduced visibility and haze are primarily caused by soot, which also damages forests and crops by reducing nutrients in soil. Sulfur ...