U.S. wildfires help make Vancouver air quality among worst in the world
在加拿大 U.S. wildfires help make Vancouver air quality among worst in the world | Globalnews.caBe prepared for possible darkened and orange skies, said Metro Vancouver.globalnews.ca哪位给个专业看法，老美的冠状病毒会不会随着烟雾飘...华人论坛