ores or minerals, or for the casting, puddling or rolling of iron or other metals, or for the conversion of pig-iron into wrought-iron ... operation of any process emitting or causing emission of smoke] [Clause (e) inserted by W.B. Act 50 of 1978.] : [Provided that where prior
ores or minerals, or for the casting, puddling or rolling of iron or other metals, or for the conversion of pig-iron into wrought-iron ... coke without ovens or special [appliances, or] [(e) the operation of any process emitting or causing emission of smoke]: [Provided that where prior
ores or minerals, or for the casting, puddling or rolling of iron or other metals, or for the conversion of pig-iron into wrought-iron ... operation of any process emitting or causing emission of smoke] [Clause (e) inserted by W.B. Act 50 of 1978.] : [Provided that where prior
ores or minerals, or for the casting, puddling or rolling of iron or other metals, or for the conversion of pig-iron into wrought-iron ... coke without ovens or special [appliances, or] [(e) the operation of any process emitting or causing emission of smoke]: [Provided that where prior
