Green roofs improve the urban environment – so why don't all buildings have them? [This article is republished with kind permission from The Conversation – see below*] USEPA/Flickr. Michael Hardman , University of Salford and Nick Davies , University of Salford Rooftops covered with grass, vegetable gardens and lush foliage are now a common sight in many cities around the world. More and more private companies and city authorities are investing in green roofs, drawn to their wide-ranging benefits which include savings on energy costs, mitigating the risk from floods, creating habitats for urban wildlife, tackling air pollution and urban heat and even producing food. A recent report in the UK suggested that the green roof market there is expanding at a rate of 17% each year . The world’s largest rooftop farm will open ...
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