Answer:
Bonjour,
Pollution in a city can considerably affect the health of those who live there, for example in terms of health (Co2 can create cancer ... but also in terms of a person's mental aspct, on his brain). I am a French girl and I live in Paris (a quite polluted city). However, the mayor of Paris has tried to put in place certain measures to eliminate this pollution (such as, for example, the fact of thinking about the installation of a sustainable city, carpooling, travel by bicycle ...) and now the pollution is reduced here!