The Port of Montreal is a founding member of Green Marine, a voluntary environmental program for the maritime industry in Canada and the United States. Green Marine addresses environmental issues such as greenhouse gases, cargo residues, conflict of use (noise, dust, odours, luminous pollution), water and soil pollution prevention, and environmental leadership. In Green Marine's most recent progress report, on a scale of 1 to 5, where Level 5 corresponds to the highest performance rating possible, the Port of Montreal scored Level 4 for its efforts to reduce greenhouse gas emissions, and Level 5 for its efforts to reduce conflict of use and for its environmental leadership.