dense fog

Dense fog can reduce visibility, forcing pilots and air traffic controllers to use special procedures for takeoff and landing.

The researchers revealed how the chemical combined to form the acid cloud that killed 12,000 in 1952.

The phenomenon of dense fog occurs a lot in the winter and hinders and is very dangerous for traffic participants. To ensure safety in the process of moving drivers, pay attention

The meteorological expert explained that dense fog appeared due to the warm air from the land mixed with the cool sea air.

On February 5, all primary schools in the capital Tehran were closed when dense fog and pollution covered the city and neighboring provinces.

From the morning of January 2, many roads and streets in the capital of Hanoi and some provinces in the North were sunk in a dense fog, making foresight to be limited.

Early this morning (February 15), Hanoi is covered by dense fog. At 8.30am, the fog is still thick, the tall buildings in the fog, the vehicles on the road have to turn on the

Beijing officials this week advised children and the elderly to stay in the house due to severe dense fog.

Pollution in China once again falls into seriousness even after entering May, the time when burning coal to operate the heating system is almost gone.

According to Iran's official IRNA news agency, the city of Tehran has announced the decision to close all government agencies and schools in the capital on January 5 due to serious