Toronto is similar (~52% tree coverage) and pollen can go off the charts. https://www.toronto.ca/legdocs/mmis/2016/pe/bgrd/backgroundfile-97020.pdf https://www

Toronto is similar (~52% tree coverage) and pollen can go off the charts. https://www.toronto.ca/legdocs/mmis/2016/pe/bgrd/backgroundfile-97020.pdf https://www.toronto.ca/legdocs/mmis/2016/pe/bgrd/backgroundf...