Heavy air pollution in Beijing in April, 2020. Beijing will issue a yellow alert for heavy air pollution from today due to smog that is forecast for the city until Tuesday, local authorities said Saturday, Xinhua reports. The yellow alert is issued when the air-quality index surpasses 200 for two consecutive days. The capital's air quality is expected to gradually improve on Tuesday. Under Beijing's current three-tier color warning system, the yellow alert is the least severe, followed by orange and red.

Source: The Standard November 15, 2020 04:18 UTC