Air pollution, temperature and respiratory disease: a South African study: Children aged 0-14 years are likely to be physically active outdoors when it's warm. Hello World/Getty ImagesGlobal warming and air pollution have something in common: their effects on human health. Air pollution is a well-known cause of breathing problems. Hot weather can also bring on these … [Read more...] about Air pollution, temperature and respiratory disease: a South African study | The Conversation