Results from a new pollution-detecting technology, which has been installed in Leicester city, could help with environmental decisions in the future, scientists said.
The technology uses a "heatmap" to show pollution levels in the area, showing levels of nitrogen dioxide (NO2) across the city.
As part of a project "developing solutions to the national problem" of improving overall air quality, scientists have also used a device to map air quality around the city.
Monitoring visible light, it measures how much is lost at specific wavelengths absorbed by nitrogen dioxide.
The device was previously used as part of the CityScan project, to measure pollution in Leicester, Bologna, and London during the Olympics.
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Dry and turning sunny for most parts, but low cloud, mist and fog may affect coastal areas until late afternoon.
Fine and dry with plenty of warm sunshine and light winds. Risk of isolated heavy showers and thunderstorms during the afternoon.
Pollen: East Midlands Weather