CALGARY, CANADA - MAY 15: Modern building utilizing the environmental technology on May 15, 2008 in Calgary, Alberta. The Solar panels provide energy for electricity and shade over the windows.
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Editorial credit: Jeff Whyte / Shutterstock.com

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CALGARY, CANADA - MAY 15: Modern building utilizing the environmental technology on May 15, 2008 in Calgary, Alberta. The Solar panels provide energy for electricity and shade over the windows.