air pollution exceeds new guidelines set by the World Health Organization, and this could damage their health, researchers say.According to researchers at CANUE – the Canadian Urban Environmental Health Research Consortium – around 86 per cent of Canadians live in areas where airborne fine particulate matter levels exceed the WHO guidelines that were issued in late September.Around 56 per cent of people live in areas where the levels of nitrogen dioxide exceed the new guidelines, said Jeff Brook, an assistant professor in public health and chemical engineering and applied chemistry at the University of Toronto who works with CANUE.