Today

HYDE PARK - The Cincinnati Earth Institute will present an "Earth Evening" from 7-9 p.m. today at Hyde Park Community United Methodist Church, 1345 Grace Ave. Bob and Deb Miller will present a visual and educational program about Highlands Nature Sanctuary east of Hillsboro. The event is free to the public. Information: 233-3676 or visit www.HighlandsSanctuary.org.

Saturday

BATAVIA - The community is invited to a free Earth Day Celebration from 10 a.m. to 2 p.m. Saturday at the University of Cincinnati-Clermont College, 4200 Clermont College Drive. The event is held in partnership with the Clermont County Clean and Green Community Litter Pick-Up and the East Fork River Clean-Up. There will be displays and demonstrations for all ages focusing on environmental awareness and stewardship by the Division of Wildlife, Cincinnati Museum Center and Raptor Inc. Janet Stein Carter will present a program on cicadas. Information: 732-5229 or e-mail Phyllis .Frederick@uc.edu.

MASON - Participants in the annual Mason Earth Walk should gather in front of the Mason Municipal Center, 6000 Mason-Montgomery Road, after 10 a.m. Saturday for a walk that begins at 10:30 a.m. and goes through downtown Mason. A program, "Earth Day, Every Day," will take place following the walk. It will feature activities and demonstrations by Mason's Public Works Department, naturalist Kendra Schide and the Mason Tree Committee that will teach ways to make the earth a healthier place to live.

MOUNT HEALTHY - Volunteers are needed to join a litter patrol on Great American Cleanup Day. Those willing to help should meet at the city building at 10 a.m. Saturday. Residents may drop off used tires behind Mount Healthy Hardware off Harrison Avenue ; car batteries and used oil may be taken to Tri-R-Auto, 7620 Harrison Ave. Information: 931-8830, ext 12.

NORTH AVONDALE - Wear old clothes and come to work with Cincinnati Councilman Christopher Smitherman 8 a.m. to 5 p.m. Saturday at Martin Luther King Park, 3740 Reading Road. Gloves, garbage bags, T-shirts, beverages and a light lunch will be provided. To sign up, call 352-3464.

Saturday and Sunday

AVONDALE - Earth Day Celebration, 10 a.m. to 3 p.m. Saturday and Sunday at Cincinnati Zoo & Botanical Garden, 3400 Vine St. Learn about the vital role plants play in the lives of both people and wildlife during the "Cincinnati Zoo Blooms" weekend. $11.50, $9 senior citizens, $6 children 2-12; free to children under 2. (513) 281-4700.