Have you noticed that, so many public spaces in the UK are filled with air fresheners? Yes, that familiar pesticide-like smell, the kind of chemical air freshener that you would never use in your home. It is now being pervasively used in UK’s residential and office buildings, lifts and corridors, hotels, Uber and Bolt cars, Black Cabs, railway and underground trains, domestic and international airlines, airports, some shops, and more.