Climate Change Is Single Biggest Health Threat, WHO Says

Climate change is the single biggest health threat that humanity faces as extreme weather events kill thousands and weakens healthcare systems where they are needed the most, according to a new report by the World Health Organization.

The report, published ahead of the United Nations Climate Change Conference in Glasgow, said that nine out of 10 people breathe overly-polluted air and that the burning of fossil fuels causes millions of premature deaths every year.