Threats to Ecosystems - Industrial Discharge Sites

Industrial activities generate waste that is discharged into water bodies, the air or ends up in landfill sites. Air is the most common release medium. Ammonia, methanol, sulfur dioxide, and nitrogen dioxide are by far the most common industrial pollutants released in Canada. Industrial discharge sites are concentrated in southern Ontario and Quebec, and around major cities in British Columbia and the Prairies. The map shows the number of industrial discharge sites per ecoregion.