Smog is a type of air pollution produced by the mixture of fog, a natural type of cloud found near ground level, and smog, particulate matter than can be caused by factories, automobiles, volcanic eruptions, or forest fires, to name a few sources.
Camcorders are cameras that are able to take videos. The camcorder features used to be contained in a large rectangular-shaped camera almost the size of a shoe box, but now the same functions can be found in a cell phone camera.
