“All you have to do is climb a tall building in Germany, and you’re going to see green roofs all over the place.”

Many countries like Germany (pictured) and Switzerland are now mandating that all new buildings with flat roofs must plant a garden on them. What will cities look like when this practice becomes the norm? (Pics)

Here you can see a Chicago rooftop, whose green garden looks like a luxury rather than something that’s been mandated.

Inspired by a worldwide movement, Mayor Richard Daley has made Chicago North America’s leading “green roofs” city.

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