Air Pollution Act, 1987
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 Obligation to prevent air pollution.  |   
 24.—(1) The occupier of any premises, other than a private dwelling, shall use the best practicable means to limit and, if possible, to prevent an emission from such premises.  | |
(2) The occupier of any premises shall not cause or permit an emission from such premises in such a quantity, or in such a manner, as to be a nuisance.  | ||
(3) In any prosecution for a contravention of this section, it shall be a good defence to establish that—  | ||
(a) the best practicable means have been used to prevent or limit the emission concerned, or  | ||
(b) the emission concerned was in accordance with a licence under this Act, or  | ||
(c) the emission concerned was in accordance with an emission limit value, or  | ||
(d) the emission concerned was in accordance with a special control area order in operation in relation to the area concerned, or  | ||
(e) in the case of an emission of smoke, the emission concerned was in accordance with regulations under section 25 , or  | ||
(f) the emission did not cause air pollution.  |