It's important to understand that the Greater Toronto Airports Authority, or GTAA, is semi-independent. It's growing without strict supervision from the Government of Canada. An agreement between the City of Toronto and the GTAA was proposed in 2000. That agreement would have required the airport to obey certain rules regarding high noise levels, pollution and land use. But the agreement was never signed, and we don't know why. Neither party was interested in becoming good neighbours.
Business at the airport has picked up very quickly, leading to major public health and operational safety issues. In 2012 and 2017, the Transportation Safety Board of Canada investigated 25 close calls there. This is problematic. That's why we are calling for an ombudsman.