In 2009, the Toronto Medical Officer began studying the effects of pollution at Toronto airports.  TPA initiated a Jacobs Consultancy study to study air pollution from the airport as part of an environmental assessment of the airport`s operations.  In January 2010, the Toronto Board of Health began consultations on the health effects of the island airport, including the proposed increase in traffic.  Trans-Canada Air Lines was to enter service in 1937, so the city council (excluding McBride, who had died a few days earlier) formed an “Airport Advisory Committee” in November 1936 to advise on where a municipal airport should be built.  The Committee proposed several sites, two of which were approved by the Government of Canada, which agreed to fund one-quarter of the project. The two sites were the island and Malton, northwest of Toronto. A seaplane and a land airport were to be built on the island and an aid field was to be built at Malton.  The project would fill the regatta lagoon and expand the airport site on both the east and west sides. After two days of debate, the city council voted by 14 votes to 7 to build the two airports.  In January 2010, TPA announced that it was seeking a private partner for the construction of a pedestrian tunnel.
The cost has been estimated at $45 million. This is expected to be funded by an increase in the airport charge of 5,$US per flight. On July 12, 2010, the TPA announced its intention to begin construction of the tunnel as early as 2011, after conducting an environmental assessment.  The tunnel would not be built on or over City of Toronto lands, meaning no City authorization would be required.  TPA also announced that an opinion poll conducted on behalf of TPA indicates that “a majority (56%) of Torontonians support a pedestrian tunnel leading to the island`s airport.”  Uncertainty about Porter Airlines` growth trajectory developed after the new Canadian government fundamentally cancelled the airline`s plans to operate Bombardier Narrowbodies from Billy Bishop Toronto City Airport. Porter unveiled his ambitions to expand from Billy Bishop and a conditional order from Bombardier about two years ago. From the beginning, Porter faced strong political opposition to his plans to extend the runway and add jet operation from the airport, which is currently limited to turboprop flights. The political counter-reaction to the change in the airport`s operating profile continued, with Porter not really proposing safeguard plans for its operations if its plans were not realized. After the new government rejected the plan, Porter has yet to lay out his business strategy for the future. Its lack of clarity raises questions about the state of its overall viability in the Canadian market if its two main competitors continue to expand relentlessly. Air Canada and WestJet are focused intensively on the proper management of all Canadian passenger segments, particularly the profitable travellers who serve as the basis for Porter`s business model. On 19 October 2009, TPA issued a press release stating that other airlines were interested in using the airport and were accepting expressions of interest. The TPA found that any increase in commercial traffic would be linked to the 1983 tripartite agreement on limit values for use and noise.
 In December 2009, the TPA announced that it would allow between 42 and 92 daily landings and take-offs at the airport, beyond the 120 “slots” currently allocated per day. . . .