I couldnt breathe: the deadly health burden of wildfire smoke

Scientists race to untangle complex links between exposure and mortality as fire weather grows more prevalentA thousand kilometres from the infernos gorging on northern Ontarios boreal forests, Erin OConnor watched the sky above Canadas biggest city turn an almost post-apocalyptic orange as it filled with light-scattering particles of soot and ash. Stepping outside the halls of Toronto General hospital, where air filters were keeping patients safe from the worst of the fumes, she was struck by a...