From the Toronto Star:

Citing concerns about diesel train fumes, Toronto’s board of health is urging that GO’s Georgetown service expansion and the Union Station to Pearson Airport rail link be switched to electric power even before it begins operations.

GO has already announced it will begin a study of electrifying its entire rail network this summer, but the latest plans don’t foresee a full conversion for another 15 years.

The expanded line and air-rail link led by Metrolinx is expected to be ready in 2013, and would mean 250 to 450 diesel trains passing daily on the corridor, up from today’s 50.

The Toronto Board of Health report can be viewed here.

More information is available at the Clean Train Coalition website. The Metrolinx consultation portal can  be accessed here.