Bosses at Mossmorran say they are taking safety into account, as flaring is taking place for the next 48 hours.
ExxonMobil, who own the ethylene plant near Cowdenbeath, say they are being forced to release the excess gas becase of an ‘operating error’.
People living near to it say the large flame causes vibrations and noise pollution.
A spokesperson for the company said: “ExxonMobil Chemical Limited would like to apologise to the local communities for any concern or inconvenience caused as a result of the flaring from the Fife Ethylene Plant, Mossmorran.
“The flaring is a result of an operating upset on our main compressor.
“We are now working to return to normal operations and anticipate that the flaring will continue over the next 48 hours and we will provide further updates in due course.
“The flare is an essential part of the plant’s safety systems and there is no danger to local communities or employees.
“We would like to assure you safety and environmental protection are our highest priorities and that we will do all we can to keep flaring to a minimum.”