As towns continue to grow, replanting vegetation has become a form of urban utopia and green roofs are spreading fast. Last year 1m square metres of plant-covered roofing was built in France, as much as in the US, and 10 times more than in Germany, the pioneer in this field.
2013 May 10, Audrey Garric, “Urban canopies let nature bloom”, in The Guardian Weekly, volume 188, number 22, page 30