• It might be easy to be green at the GoGreen Conference, 9 a.m. to 5 p.m., Gerding Theater at the Armory, 128 N.W. 11th Ave.
• Celebrate new tennis courts at Argay Park's tennis play day, 2:30 to 5:30 p.m., Northeast 141st Avenue and Failing Street. www.ParksReplacementBond.org
• Hear author Robert Steelquist read from his book, "The Northwest Coastal Explorer: Your Guide to the Places, Plants, and Animals of the Pacific Coast," 7 p.m., Broadway Books, 1714 N.E. Broadway. www.broadwaybooks.net.
• Find a solution to Portland's homeless quandary at Portland State University's Convenes: Can We Solve Portland's Homeless Crisis, 7 to 8 p.m., Smith Memorial Student Union Ballroom, room 355, 1825 S.W. Broadway. www.pdx.edu/
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