Wildfire smoke shrouds Vancouver, Canada, Aug. 1, 2021. Environmental Canada has issued a special air quality warning to metro Vancouver after the wildfire smoke arrived in Vancouver region. (Photo by Liang Sen/Xinhua)
Wildfire smoke shrouds Vancouver, Canada, Aug. 1, 2021. Environmental Canada has issued a special air quality warning to metro Vancouver after the wildfire smoke arrived in Vancouver region. (Photo by Liang Sen/Xinhua)
Wildfire smoke shrouds Vancouver, Canada, Aug. 1, 2021. Environmental Canada has issued a special air quality warning to metro Vancouver after the wildfire smoke arrived in Vancouver region. (Photo by Liang Sen/Xinhua)