Second report of Canada under the 1987 Protocol which amended the 1978 Canada-U.S. Great Lakes Water Quality Agreement. The report presents issues that Canada and Ontario have been involved with during the reporting period of January 1, 1989 to December 31, 1990. The report covers new federal and provincial initiatives, citizen action, and initiatives by industry; progress in the years since the first report in toxic substances, ecosystem and health, and cleanup; and a summary of official response to recommendations from the fourth and fifth biennial reports of the International Joint Commission and the International Joint Commission/Great Lakes Fishery Commission's report on exotic species and the shipping industry in the Great Lakes and the St. Lawrence River. New initiatives include action in cleanup, preservation, health effects, pollution prevention, action on the St. Lawrence River, the Canadian Healthy Communities project, the Environmental Partners Fund, contaminated sites cleanup, vehicle emissions strategy, Safe Drinking Water Act, and watershed management planning strategy.