King Edward 1 makes first anti-pollution law to restrict people from using coal for domestic heating in year 1273. In 1300 anor act for banning use of coal passed. Defying law led to severe punishment.

Air pollution became a serious problem in London during Industrial Revolution. The earliest recorded major disaster was London smog that occurred in 1952, which resulted in more than 4000 deaths.

In Europe during 19th century, a black form of peppered moth began appearing in industrial areas. The normal pepper patterned moths were successful in surviving in clean non-industrial areas, only black colored moths were successfully adopted mselves in industrial areas.

In 20th-century air pollution began to increase with development of transportation systems and large scale use of petrol and diesel usage. Pollution due to auto exhaust is a serious environmental issue.

The air also becomes polluted by natural causes such as volcanoes which results in ash, dust, sulphur and or gases. Occasionally due to lightning forest fires also happens which results in loss of vegetation and also cause air pollution.

Pollutants that are emitted from identified sources which are produced by both by natural events and by manmade activities are known as primary pollutants. The five primary pollutants are carbon oxides, nitrogen oxides, sulphur oxides, volatile organic compounds and suspended particulate matter.

The pollutants produced in atmosphere when certain chemicals reactions take place among primary pollutants are called secondary pollutants. Some of examples of secondary pollutants are sulphuric acid, nitric acid and carbonic acid.

Vehicular exhausts are largest single source of carbon monoxide. It is a colorless, odorless and toxic gas produced when organic materials like natural gas or wood are incompletely burnt.

Particulates are small pieces of solid material like dust particles and ash from industries which dispersed into atmosphere. Repeated exposure to particulates causes m to accumulate in lungs and cause severe problems.

Aerosol is a general term which is used to express meaning for particles which are suspended in air. This aerosol contributes to air pollutants as y join or materials in atmosphere. Sprays from pressurized cans are an example of aerosol.