CSs of meteorologist (civil servant) taking reading from instrument in his lab (1:36). LS of Canada Steamships Lines ore freighters docked in harbour with thick smoke coming from smokestacks of coal fired power generation station in background, PAN LEFT to MLS of instruments used to gather information on air pollution set up on mobile trailer (0:40). MWSs of clouds of thick smoke produced by power plant (0:40). Another PAN SHOT from freighters to trailer (0:34). FOLLOW LS of long-range jet flying through cloud of smoke (0:53). MLS of plants smokestacks billowing thick smoke (0:22). MS of air pollution data collecting instrument on site, a meteorologist comes into view and proceeds to change filters, shots of him inside his lab, CU of stained filters laid out on counter, CU of his hands preparing a new filter cartridge (2:22). MWSs of smokestacks billowing thick smoke at dusk (0:41).