The new Bobigny school is a massive, spiraling structure that's topped with several green roofs.
And as climate change stays in the headlines, the popularity of green roofs is growing.
CNN: Green roofs cool cities, combat climate change, say Germans
It includes green roofs and landscaping, meaning the rain tree would be surrounded with greenery.
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In the northern English city of Sheffield, even bus shelters now sport green roofs to filter pollution.
In London alone, there are approximately 1 million square meters of green roofs planned, with about 200, 000 square meters already installed.
CNN: Green roofs cool cities, combat climate change, say Germans
"In Switzerland, green roofs are federal law, but again this is interpreted at a cantonal and city level, " he told CNN.
CNN: Green roofs cool cities, combat climate change, say Germans
It's green roofs' ability to retain high levels of precipitation that are seen as way to control and slow the water run-off.
CNN: Green roofs cool cities, combat climate change, say Germans
According to Google it's designed for many workers to operate just on natural light, and avail themselves of the many cafes and green roofs.
But while green roofs might cost twice as much to build, they have been shown in Europe to last twice as long as a conventional roof.
The green roof market alone grew by 115% last year, according to Green Roofs for Healthy Cities, a not-for-profit organization touting the benefits of turf roofing.
" Green roofs also struggle against better-known technologies such as solar panels, but Gedge points out, "Solar panels can work better on green roofs than on gray roofs.
CNN: Green roofs cool cities, combat climate change, say Germans
Replacing concrete with porous pavement, employing green roofs and rain barrels, restoring creeks and wetlands, and increasing tree cover can help cities absorb rain water rather than funnel it to sewer systems.
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Beyond that, it was fascinating to see seeing what Detroit automakers are doing to reduce their carbon footprints, like using green roofs that insulate their buildings, porous pavement to filter rain water and even solar panels to help power their facilities.
There's also a section devoted to "green" roofs, both literally and figuratively, those planted to reduce New York's "heat-island" effect and storm-water runoff.
We have 191 million buildings in the EU. The mission now is to convert the entire building stock of Europe to partial green power plants that can collect solar energy on the roofs, wind energy off the sides of the building, geothermal energy from the ground below the building, biomass energy from the conversion of garbage in the building, etc.
Right now, when you fly into a typical American city, you see miles of black roofs (mostly tarpaper shingles, made with a byproduct from burning coal), flanked by green lawns.
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