Hot weather brings summer smog

Levels of ozone reached their highest point of the year so far as the UK bathed in warm sunny weather last weekend. Pollution levels were high across the UK on Saturday (Copyright AEA and Defra) Members of the public were urged to cut back on unnecessary car journeys to reduce the formation of ground-level ozone, and warned to avoid exercising outdoors in the afternoon to reduce exposure. Monitoring stations at several locations measured high levels of ozone as temperatures soared above 25 degrees Celsius in many areas.