Âé¶¹´«Ã½

Green roofs save on carbon overheads

30 September 2009

Âé¶¹´«Ã½. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

Camouflage housing

(Image: Jim Brickett)

GREEN roofs are not just a load of greenwash. That’s according to a new study which has measured the amount of carbon absorbed by 13 different green roofs.

Kristin Getter of Michigan State University in East Lansing and her colleagues found that the roofs absorbed up to 375 grams of carbon per square metre over the two years of their study.

That may not sound like much, but it adds up. If every roof in a city the size of Detroit, Michigan, with around a million inhabitants, were a green roof, it would remove as…

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