The Air Quality Agreement is an environmental treaty between

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

and the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

. It was signed on 13 March 1991 by Canadian prime minister Brian Mulroney and American President George H. W. Bush and entered into force immediately. It was popularly referred to during its negotiations as the "Acid Rain Treaty", especially in Canada. Negotiations began in 1986 when Mulroney first discussed the issue with then-president Reagan. Mulroney repeatedly pressed the issue in public meetings with Reagan in 1987 and 1988

References

{{DEFAULTSORT:U.S.-Canada Air Quality Agreement Canada–United States treaties Environmental treaties Treaties concluded in 1991 Treaties entered into force in 1991 1991 in the environment Air pollution in Canada Air pollution in the United States Air pollution control systems 1991 in Canadian law 1991 in American law Canada–United States relations Transboundary environmental issues