Vehicles travel along a highway under foggy condition in Vancouver, Canada, on Jan. 23, 2022.Photo:Xinhua

Residents look in the direction of the fog-covered city of Vancouver from Cypress Mountain in Vancouver, Canada, on Jan. 23, 2022.Photo:Xinhua

Vehicles travel across the Lions Gate bridge under foggy condition in Vancouver, Canada, on Jan. 23, 2022.Photo:Xinhua