visitor from another planet

 Air pollution comes from both natural and man made sources. Though globally man made pollutants come from combustion, construction, mining, agriculture and warfare are increasingly significant in the air pollution equation. Motor vehicle emissions are one of the leading causes of air pollution. Another form of pollution comes from factories where they make things such as chemical plants, coal-fired power plants, oil refineries, petrochemical plants, nuclear waste disposal activity, incinerators, and large livestock farms. Agriculture causes pollution as well because farmers spray pesticides and herbicides and also clear felling and burning of natural vegetation. Pollution is bad and it is harming our planet.Air pollution makes the air unhealthy and dangerous. Air pollution is also responsible for the damege that is done to the ozone layer. There are other types of pollution such as water pollution, land pollution, and many more.