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What is O3 and what does it do?

O3 - Low Level Ozone. Produced by sunlight acting on vehicle exhaust fumes. It can cause eye and lung irritation, lowers resistance to infection, not good if you have asthma. it can poison plants.

You can ...

Maintaining your car (oil filter, tyre pressure) can reduce pollution and save you money. Filling up with petrol at night can reduce O3 because air pollution is less lightly at night - weird! Try to avoid using your car on your own.

Simple changes will improve air quality, reduce the number of people with breathing problems and asthma, and reduce the cost of running the NHS!

Photo: Cutty Sark Tea Clipper ship