waste gas(Any unusable aeriform fluid, or suspension of fine particles in air, given off by a manufacturing process or the burning of a substance in a enclosed area)
waste gas dispersion(The process of breaking up and producing a diffuse distribution of the unusable aeriform fluid or suspension of fine particles in air resulting from a manufacturing process or the burning of a substance in an enclosed area)
waste gas examination(Qualitative and quantitative analysis of exhaust gases emitted from vehicles, industrial plants, etc. in order to asses their composition)
waste gas reduction(Reduction of the quantity of gaseous emissions in the atmosphere, from motorvehicles, industrial and heating plants, etc. by the adoption of clean technologies, the effectiveness of process operations, the improvement of fuel quality and the installment of chimney stacks high enough to ensure the dispersion of gases)