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I’d like to know more about on-site wastewater treatment and green roofs in NYC. Can you help?

— Cesar Yoc, New York, NY

Answered by Paul Gleicher on June 12, 2009

What's the difference between a green roof and a white roof?

— Angela Corcoran, Brooklyn, NY

Answered by Susan Wisniewski on May 2, 2008

 
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