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The One Earth Film Festival, sponsored by the Green Communities Initiative, includes free film screenings in Grayslake and Waukegan.

Walk-ins are welcome, but the festival producers suggest participants obtain tickets ahead of time online, especially for the virtual-reality film “Valen’s Reef.” Donations are accepted. To obtain tickets, visit www.oneearthfilmfest.org/lake-county-films-2017

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Saturday

1:30 p.m., “Hometown Habitat,” Prairie Crossing School, 1531 Jones Point Road, Grayslake

Filmmaker Catherine Zimmerman will attend the screening, which shows people from all over the country as well as in Grayslake creating native plant landscapes.

Sunday

5 p.m. “Years of Living Dangerously: Uprising”

Christ Episcopal Church, 410 Grand Ave., Waukegan.

Film stars America Ferrera and Sigourney Weaver take viewers to communities, including Waukegan, struggling to transition from fossil-fuel based energy sources to renewable energy sources. Waukegan residents featured in the film will be there for discussions.

March 10

“A Plastic Ocean” and “Valen’s Reef”

5:30 p.m. for “Valen’s Reef,” 6:30 p.m. for “A Plastic Ocean,”

College of Lake County, Building A Auditorium, 19351 W. Washington St., Grayslake.

Some images could be disturbing in this film about how plastics are harming the ocean, its inhabitants and humans. “Valen’s Reef,” a virtual reality film will be shown before and after “A Plastic Ocean.” A limited number of participants can view “Valen’s Reef,” which requires wearing a headset.

March 11

“Shifting Sands” 2:30 p.m. with Spanish subtitles

Waukegan Public Library 28 N. County St., Waukegan

A region where rare plants grow next to smokestacks is revealed.

“Before the Flood” 6:30 p.m. with Spanish subtitles

College of Lake County, 19351 W. Washington St., Building A, Auditorium, Grayslake

The National Geographic film features Leonardo DiCaprio traveling to five continents and the Arctic to witness climate change with scientists and political leaders. Some images could be disturbing.

Sheryl DeVore is a freelance reporter for the News-Sun.