2. Definitions .-In this Act, unless the context otherwise requires, -
(a)“air pollutant ” means any solid, liquid or gaseous substance 2[(including noise)] present in the
atmosphere in such concentration as may be or te nd to be injurious to human beings or other living
creatures or plants or property or environment; (b)“air pollution ” means the presence in the atmosphere of any air pollutant ; (c)“approved appliance ” means any equipment or gadget used for the bringing o f any
combustible material or for generating or consuming any fume, gas of particulate matter and
approved by the State Board for the purpose s of this Act; (d)“approved fuel ” means any fuel approved by the State Board for the purposes of this Act; (e)“automobile ” means any vehicle powered either by internal combustion engine or by any
method of generating power to drive such vehicle by burning fuel; (f)“Board ” means the Central Board or a State Board; (g)“Central Board ” means the 3[Central Pollution Con trol Board ] constituted under section 3 of
the Water (Prevention and Control of Pollution) Act, 1974 (6 of 1974) ; (h)“chimney ” includes any structure with an opening or outlet from or through which a ny air
pollutant may be emitted; (i)“control equipment ” means any apparatus, device, equipment or system to control the quality
and manner of emission of any air pollutant and includes any device used for securing the efficient
operation of any industrial plant;