Air pollution is a rising concern with climate change and wildfires having a growing impact on every day life. It's worst impacts hurt vulnerable populations.
Finland-based Centre for Research on Energy and Clean Air reports levels of nitrogen dioxide (NO2) - from traffic and heavy industry - dropped 40 percent in the past 30 days.
Researchers from Leeds University found moor land blazes in Greater Manchester in 2018 caused poor air quality over a large region - reaching as far as Bolton, Wigan and even Southport.