Video report by ITV News Correspondent Martin Stew
Air pollution is known as the invisible killer for good reason. It causes 40,000 people to die prematurely each year in the UK but many of the deadly gases we breath are impossible to see with the naked eye.
Today we got the best ever picture of our toxic air as seen from space.They're from a new satellite called Sentinel-5P which was built in Stevenage and launched into orbit six weeks ago. Today's pictures are ten times sharper than anything we've seen before and put together from twenty million observations everyday.
The images show ozone in the atmosphere, nitrogen dioxide released from factories and even sulphur dioxide from Mount Agung which has been erupting in Bali.
Combined with weather forecasts, the data from Sentinel 5P will help pollution experts forecast toxic air episodes.
Whilst the resolution of the data is still not as good as monitoring stations at ground level Professor Frank Kelly from Kings College London believes it will be a useful tool in assessing the causes of climate change.
There's just one problem, Sentinel-5P can't see through cloud. So whilst we already have data showing pollution in Italy's industrial north - we'll have to wait for clearer skies before we see more of this country.