Living with smokers is as bad as living in smoke-free homes in heavily polluted cities such as Beijing or London researchers said. Moving to a smoke-free home could have major health benefits for non-smokers they noted. 'Making your home smoke-free is the most effective way of dramatically reducing the amount of damaging fine particles you inhale' said lead author Sean Semple from the University of Aberdeen in Scotland. (Read: Natural remedies to quit smoking) The researchers studied data from four linked studies carried out in Scotland between 2009 and 2013 that had real time measurements of fine particulate matter PM2.5