Chicago Green Festival Hundreds of green businesses hawk their wares, including organic beer and wine and vegetarian food. Activities include workshops, films, yoga, kids’ programs, and talks by Bill Ayers (see the Business), columnist Jim Hightower, conceptual artist Damali Ayo, and others. aFri 5/15, 11 AM-6 PM, Sat 5/16, 10 AM-7 PM, Navy Pier, 600 E. Grand, 312-595-5184, greenfestivals.org, $15, $10 students, bike riders, and union members.
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Chicago River Day Festival Three hours of volunteer work followed by a festival with music, crafts, and free food for workers (it’s also open to the general public). Participants can choose from 60+ sites along the river to help with litter collection, invasive species removal, and trail maintenance. Register at the Friends of the Chicago River Web site (chicagoriver.org). aSat 5/9, 9 AM-3 PM, River Park, 5100 N. Francisco, 312-939-0490.F
From the Microscope to the Macroscope: Applying Biomimicry in the Built Environment This panel discussion hosted by the Chicago Architecture Foundation presents experts in the emerging field of biomimicry, or studying nature’s systems and imitating them to solve human problems. Sustainable design specialists from the architectural firm HOK will discuss how it applies to architectural design. aMon 4/20, 6-7:30 PM, Columbia College Film Row Cinema, 1104 S. Wabash, architecture.org.F
Hazardous Waste Drop-Off Spring cleaners can dispose of toxic, corrosive, and flammable waste, including household chemicals, lead- and oil-based paint, gas cans (trade for an eco-friendly one), gas-powered lawn mowers (trade for a $100 rebate on a push or electric mower), computers, cell phones, and old medications. Latex paint and working TVs will not be accepted. You can also pick up a free CFL bulb and buy a discounted compost bin ($35) or rain barrel ($45). aSat 4/18, 9AM-3 PM, U.S. Cellular Field parking lot, 333 W. 35th; Sat 5/9, 9 AM-3 PM, DeVry University north parking lot, 3300 N. Campbell Ave, 312-744-7606, cityofchicago.org/environment.F
