Air pollutants have the potential to impact environment and human health both locally and across political and geographic boundaries. Governments across Canada pursue active programs – individually and collectively – on air issues. Under CCME, governments have engaged in a variety of activities directed at specific air issues, such as acid rain, ozone-depleting substances, and standards for toxic substances to improve air quality and achieve health and environmental benefits. In 2012 ministers of the environment, with the exception of Québec, agreed to implement a new Air Quality Management System (AQMS) to guide work on air emissions across Canada. AQMS is intended to provide a comprehensive approach for improving air quality in Canada and to publicly report on Canada’s air quality.