French cities ban polluting cars amid heat wave

Three French cities have banned the most polluting cars from the roads because of pollution linked to the current heat wave in Europe.
In Paris and Strasbourg, the ban concerns vehicles that are 12 years and older, while in Lyon only cars with a clean air sticker are allowed.
Authorities warned of a peak of ozone pollution Monday because of high temperatures. Ozone is formed in the atmosphere from emissions of other air pollutants including emissions from vehicles.
It can cause irritation to the eyes, sore throats and breathing problems.
The heat wave in France is expected to last until Thursday, with temperatures peaking Tuesday.
Four nuclear reactors have already been temporarily closed in France because of the high heat.
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