Telegraph: Professor Sir Malcolm Green, the founder of the British Lung Foundation, says people with lung and heart problems may need to take greater care due to a health alert triggered by a cloud of toxic smog along with air pollution from Europe. This week, local pollution is combining with a cloud of smog that has moved over from Europe, where milder weather has also caused traffic pollution to build up, causing levels to soar above average. People with lung and heart problems are advised to minimise...