Guardian: Britain is ignoring the dangers posed by one of the world’s worst air pollutants: ozone. Researchers say that levels of the gas – a powerful contributor to global warming and the cause of hundreds of deaths a year from respiratory illnesses – are rising at an alarming rate. They have also warned that measures to curtail the gas are failing. As a result, ozone-related deaths, of which there are about 1,500 a year in the UK, could rise by 50 per cent over the next decade. Stronger …