State-run media finally talking about health threats of pollution
                                
                                
                                    (Newser) -
                                    Those shadowy days that appear in mid-afternoon in Beijing aren't just caused by fog after all, Chinese officials are finally admitting. It's throat-choking, eye-watering, blinding smog. And it's been so atrocious the last few days that authorities have had to cancel flights out of Beijing International Airport,...