Green Roof Industry Aggressively Grows 115% in 2011 - Yahoo Finance

CHICAGO, ILLINOIS--(Marketwire -05/01/12)- Editors Note: There is a Bar Graph available with this Press Release. Green Roofs for Healthy Cities (GRHC) is pleased to announce the results of its 2012 Annual Industry Survey of Corporate Members.

Source: http://finance.yahoo.com/news/green-roof-industry-aggressively-grows-110000317.html

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