Rats are a problem in Paris, according to the mayor of Paris. The city is trying to reduce the number of rats in the city.
It is also trying to prevent the spread of diseases like salmonella and tetanus. The mayor wants to make sure that the city does not have too many rats on the streets. He also wants to improve the quality of life for the city's residents by making it easier for them to get rid of the rats they find in their homes.