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Lawns on the Roof

Pretty much every green advocate agrees that suburban lawns are ecologically unsound; they waste water, they require chemicals, they drain resources. But, as these videos show, when you take that green patch and put it on your roof ... well, that's a leaf of a different color.
Pretty much every green advocate agrees that suburban lawns are ecologically unsound; they waste water, they require chemicals, they drain resources. But, as these videos show, when you take that green patch and put it on your roof ... well, that&...
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