A 10.4-acre green roof could lessen the environmental impact of operations at Ford's truck-assembly plant in Dearborn, Mich., according to this article. The roof aims to help the facility become energy-efficient, while improving air quality and mitigating runoff. The sedum-covered expanse is billed as the "world's largest living roof" and is expected to last twice as long as a traditional roof, this article states.

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