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Fig. 3: Man caused impact. A shows the smoke plume of smelters near
Sudbury (10-9-72), smelter smoke damage is illustrated by
winter image B (14-2-74). A similar situation exists near
Wawa C (3-8-73), D (12-1-74). The disturbance area near
Flin Flon E (11-10-73), an old mining town, is less
extensive. F shows a new mine near Leaf Rapids, Manitoba
(25-4-74). G shows recent (1) and older (2) cutover areas
in winter. H a new road with borrowpits (3) and clearing
(4) for a new channel development along the Rat River, Manitoba.