But cities everywhere have been experiencing growing pains, and there have been recent challenges in Europe too. In Berlin, where about 85 percent of residents rent, prices have skyrocketed since the government relaxed its rental increase policy several years ago. Like many cities around the world, Berlin has seen significant population growth, and rental housing hasn't kept up, which has driven up prices. But, unlike in Canada, Berliners appear to be taking these new problems seriously: in 2021, a majority of Berliners voted to place 240,000 corporate-owned apartments (about 11 percent of the city's total rental stock) back into public ownership and make them available at affordable rents. There's also been a strong push to fast-track new rental housing projects through the development approval process. It seems housing crises can be addressed so long as there's the will to act. Paraphrase the authors idea in 1 sentence