China smog: Disruption across northern city of Harbin\nChina smog: Disruption across northern city of Harbin\n\nThere has been widespread disruption across northern China as smog brought roads and flights to a standstill.\n\nSchools were also forced to close after visibility in parts of the northern city of Harbin in Heilongjiang province was reduced below 50m (160ft).\n\nCelia Hatton reports.\n\namerica