usage boundary a pollution complex from a steam into a oil by increasing light matter
old_coal_engine_train_which is polluting_environment. gaseous_form_of_water is steam. segregation is situation_involving_tangible_things. steam is gaseous_water. iodination is chemical_process. level_of_pollution is geographical_quantity. basin is natural_depression. steam_chamber_growth is growth_event. thermal_pollution is pollution. water_pollution is pollution.