BBC looks at France's mayoral elections and the race in Paris between Racida Dati (connected to Sarkozy) and Emmanuel Gregoire deputy to Anne Hidalgo Mayor of Paris. 930 miles of bicycle lanes in Paris have reduced pollution in Paris by 10 years, which helps Gregoire. Dati says Paris "is dirty and unsafe." She points to 10 billion euros in debt for Paris. Dati comes from the conservative side and is a protege of former president Sarkozy of the Republicain party.