Beginning in 1986, the Canadian government of Brian Mulroney began pressing the Reagan administration for an "Acid Rain Treaty" to do something about U.S. industrial air pollution causing acid rain in Canada. The Reagan administration was hesitant and questioned the science behind Mulroney's claims. However, Mulroney was able to prevail. The product was the signing and ratification of the Air Quality Agreement of 1991 by the first Bush administration. Under that treaty, the two governments consult semi-annually on trans-border air pollution, which has demonstrably reduced acid rain, and they have since signed an annex to the treaty dealing with ground level ozone in 2000. Despite this, trans-border air pollution remains an issue, particularly in the Great Lakes-St. Lawrence watershed during the summer. The main source of this trans-border pollution results from coal-fired power stations, most of them located in the Midwestern United States. As part of the negotiations to create NAFTA, Canada and the U.S. signed, along with Mexico, the North American Agreement on Environmental Cooperation that created the Commission for Environmental Cooperation that monitors environmental issues across the continent, publishing the North American Environmental Atlas as one aspect of its monitoring duties.
Beginning in 1986, the Canadian government of Brian Mulroney began pressing the Reagan administration for an "Acid Rain Treaty" to do something about U.S. industrial air pollution causing acid rain in Canada. The Reagan administration was hesitant and questioned the science behind Mulroney's claims. However, Mulroney was able to prevail The product was the signing and ratification of the Air Quality Agreement of 1991 by the first Bush administration. Under that treaty, the two governments consult semi-annually on trans-border air pollution, which has demonstrably reduced acid rain, and they have since signed an annex to the treaty dealing with ground level ozone in 2000. Despite this, trans-border air pollution remains an issue, particularly in the Great Lakes-St. Lawrence watershed during the summer. The main source of this trans-border pollution results from coal-fired power stations, most of them located in the Midwestern United States. As part of the negotiations to .create NAFTA, Canada and the U.S. signed, along with Mexico, the North American Agreement on Environmental Cooperation that created the Commission for Environmental Cooperation that monitors environmental issues across the continent, publishing the North American Environmental Atlas as one aspect of its monitoring duties.