Authorities warned people in northern China of heavy incoming smog; Beijing issued second red alert starting Saturday China warned residents across a large part of northern China on Friday to prepare for a wave of choking smog arriving over the weekend, the worst of which is expected to over Beijing, prompting the capital city to issue its second ever red alert. The red alert — the most serious warning on a four-tier system adopted a little over two years ago — means authorities have forecast more than three consecutive days of severe smog. The National Meteorological Center said the smog would stretch from Xian, home to the Terracotta Warriors, across part of central China, through Beijing and up into Shenyang and Harbin in China’s frigid northeast. The pollution is expected to begin appearing on Saturday evening and last until Tuesday, with visibility in the worst affected areas such as […]