exhaust stacks of a construction work barge at oil field

air arrestors barge black blue carbon cloud cloudy construction danger dangerous day diokside drilling engine engineering environment environmental equipped exhaust exploration field fume funnel gas handrail hazard horizon hydrocarbon industrial industry installation logistic machine machinery malaysia metal monokside ocean offshore oil oilfield oilrig petroleum pollute pollution project rig sea ship shipping sky spark stacks steel terengganu transport transportation unhealthy upstream vessel water wave weather work working