The Beijing-Tianjin-Hebei region saw worsening air quality in the first two months of the year, and pollutants from more active industrial production is a major reason, the national environment authority said.

The region and neighboring provinces, including Henan, have been blanketed with air pollution since Tuesday, though air quality in Beijing was improving on Friday.

The region is forecast to have good air quality until at least Monday, the Ministry of Environmental Protection said.