It smells like rain, but how? Find out in today's A Moment of Science.
Pollution in cities is pretty much an accepted thing, but what about pollution in the country? Learn about pollution on this Moment of Science.
There are actually two types of smog: sulfurous smog and photochemical smog. Sulfurous smog results from burning sulfur-bearing fossil fuels, which release a high concentration of sulfur oxides in the air.