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An architect and a contractor will showcase their latest energy-saving and ecologically friendly designs at 7 p.m. today in Hallwalls Contemporary Arts Center, 341 Delaware Ave., in a program called “50 Shades of Green: Green Roofs, Walls and Homes.”

Speaking will be Kevin Connors, principal of Eco-Logic Studio, Architecture & Engineering PLC; and David Lanfear, owner of Bale on Bale Construction and Green Top. The program, sponsored by the WNY Sustainable Energy Association, is free and open to the public. For information, visit www.wnysea.com.