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Additional Resources

To learn about the Elephant House at Cologne Zoo project, contact Lee Jaslow of Conservation Technology. Learn about the following companies in The Greenroof Directory: Optigr?n international AG / Optigreen and Conservation Technology, U.S. representative of Optigreen.

The Elephant House at the Cologne Zoo utilizes the Optigr?n or Optigreen greenroof system consisting of a protection mat, drainage mat, mechanical slope stabilization system, triangle drainage channel, with planting by hydroseeding and plugs.


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