CU of thick foam on surface of water, TILT UP to MLS of factory (2 shots; 0:54). CU of polluted water pouring out of sewer into small river, TILT UP to MLS of river flowing in small canyon (0:33). HAMS of polluted water pouring out of sewer into Ottawa River, PAN and TILT UP to MLS of floating barrier containing foam and pollution, CUs of foam (1:03). MLS of pollution on river Parliament Buildings in background on opposite bank (0:08). More CUs of foam on surface of water (1:00).