georges—eugene haussmann to completely redesign the city in one of the most ambitious plans of renovation in any city anywhere. inspired by london, a lighter, clean and safer paris soon emerged. the zinc rooftops became a symbol of the city's regeneration, covering around 75% of the roofs in paris. that's a lot of roofs! with not a lot of roofers to maintain them. now, several years since we tried to win this candidature, because it is very important to save the roofs of paris because each 50 or 60 years, you have to change the zinc. now, unfortunately, we have a terrible lack of well—trained roofers. why do you think there aren't enough young people who want to become roofers? young people think when you are