Smog warnings across northern China forced officials to order factories to reduce output, order construction sites to slow work, and enforce limits on the use of diesel-fueled vehicles. The city of Taiyuan in Shanxi province had the highest concentration of hazardous breathable particles. China has launched a major effort to clean the north’s notoriously toxic air during the winter, when smog blankets colder regions as people start to increase the use of heating. Beijing was the only city among 28 being monitored where air quality hadn’t become bad enough to trigger the order. For the full story see https://uk.reuters.com/article/uk-china-pollution/beijing-spared-as-smo…