This is Earth Week, and two film screenings tied to its arrival include "Huliau," inspired by the book "50 Simple Things You Can Do to Save Hawai'i," and "Oceans," Disneynature's new probe of the depths.

A third environmental event, a film symposium about the world water crisis, organized by East-West Center students, is slated for next week at the University of Hawai'i-Mānoa.

• First up, "Huliau," which explores ties between people and the land, will be screened at 6 tonight in the university's campus center ballroom. The screening is free.

A panel discussion, "Political Activism in the Sustainability Movement," will follow the 35-minute film. Panelists include Shanah Trevenna of Sustainable UH; Stuart Coleman, Surfrider Foundation; Robert Harris, Sierra Club; and Jeff Mikulina, Blue Planet Foundation.

State Senate Majority Leader Gary Hooser will host the discussion, and it will be streamed live at www.garyhooser.com.

• " Oceans," which opens on Thursday — Earth Day — in Hawai'i movie theaters, features dazzling imagery captured by the latest underwater technologies. An estimated 80 species make appearances.

Actor Pierce Brosnan narrates and oceanographer Sylvia Earle, an explorer in residence at the National Geographic Society who two years ago took part in the Hawai'i Conservation Conference, served as a consultant for the film, which included four years of shooting footage in all of the Earth's oceans.

Disneynature will make a donation to The Nature Conservancy to save coral reefs on behalf of every guest who sees "Oceans" during its opening week.

• Students in the East-West Center's Leadership Certificate Program are hosting a free screening of "Flow — For the Love of Water," 5 p.m. Sunday at Spalding Auditorium. The film focuses on people and institutions seeking out practical solutions to water problems and developing new technologies for clean water delivery.

A panel discussion and reception will follow the screening, and information about environmental initiatives and community initiatives will be provided through booth displays.