Emissions (environment)

In the quality of the air, together of the Pollutant S emitted on a given sector.

One distinguishes the emission from the Immission.

One also distinguishes the emissions according to the type of sources (Source fixes, mobile Source).

The first relate to the pollutants related to the following activities: thermo plants, industrial boilers, and industrial transmitters (Oil, Chemistry, Iron and steel industry, Metallurgy, Processing waste, Heatings domestic, etc).

The seconds relate to the rejections of the engines diesel gasoline or and those related to air transport.

In the case, for example of the Atmospheric pollution, the emissions are consisted, for a given industrial site, or a given vehicle, by the whole of the pollutants in their various forms: Gas, Blister, particle.

It is often useful, even necessary to have some, over one given period the qualitative and quantitative assessment.

For a thermo plant, the quantified rejections of CO2, SO2, PM 10, NO, NO2, Heavy metals, HAP, etc, will be given for periods of one day operation, one year.

For a Petrol engine vehicle with , it will be more judicious to quantify the rejections by traversed km (in urban cycle, of road use, at such speed, the cold start, etc), of the pollutants such: CO, CO2, SO2, NO, NO2, particles fine and ultrafine, Unburnt HAP, , etc

The pollution emissions are characterized by a Emissivity.

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