Beijing and 33 other northern Chinese cities have issued orange pollution alerts for the next few days as industrial output ramps up again after the end of winter restrictions, according to Reuters. Under China's four-tier system, red is the highest warning, followed by orange, yellow and blue.
Reuters stated that the alert, which requires industrial factories, including steel plants, to limit output by 30 percent to 50 percent, will be in operation for March 26-28.
Other cities in the Beijing-Tianjin-Hebei and surrounding region have also issued orange alerts until March 28 and will take prompt measures to reduce emissions.