BIG ISLE COMPOSTING — Learn how to compost green waste and kitchen scraps 1-3 p.m. Saturday at the Worm Club at the University of Hawai'i Komohana Extension and June 17 at The Barn in Hawi; intermediate/advanced composting 1-3 p.m. June 10 at KRRC in Kea'au and 2-4 p.m. June 17 at Pa'auilo School; $10 for adults, free for children. Reservations: www.PiperSelden.com or (808) 937-2233.

WEED WARRIORS — Student volunteers can help the Maui Invasive Species Committee survey and control invasive weed populations, learn scientific protocol and assist with conservation efforts. Cut non-native pine trees in Haleakala National Park on Saturday or catch coqui frogs at night on June 19. Reservations and parent approval required. Contact Shannon Wianecki at (808) 573-6472 or hoikeinfo@yahoo.com.

WAIKIKI BEACH HELPERS — The Waikiki Improvement Association and the Japan-America Society need volunteers for a Waikiki beach cleanup 7-9 a.m. June 10. Meet at the Duke Kahanamoku statue in Kuhio Beach Park; continental breakfast provided by Hilton Hawaiian Village Beach Resort & Spa. Register by June 5 at 923-1094, ext. 6.

ALIEN ALGAE — Volunteers are needed 8 a.m.-noon June 10 to remove alien algae at Hilton Hawaiian Village. Bring snorkeling gear if you plan to go into the water. Snack and lunch provided. Contact Signe Opheim: 779-2616 or opheim @hawaii.edu.

POUHALA MARSH RESTORATION — The Hawai'i Nature Center is restoring Pouhala Marsh in Waipahu. Volunteers are needed to pull pickleweed 8:30-11:30 a.m. June 10. Bring work gloves, water, hat, sunscreen, towel and change of clothes; covered footwear and long pants required. Contact Pauline Kawamata at 955-0100, ext. 18.

WORM COMPOSTING — Learn the basics of vermicomposting at 9:30 a.m. June 10 at Christ Church Uniting, 1300 Kailua Road; $30 fee includes minibin, starter colony and manual. 382-0432 or waikikiworm@hawaii .rr.com.

KANE'OHE WETLAND PROJECT — Volunteers are needed June 10 to help the Sierra Club clear a wetland of mangrove to create habitat for endangered water birds at Marine Corps Base Hawai'i. Because the base is a secured military facility, volunteers must provide name and Social Security number in advance and bring a signed waiver. Call Annette Kaohelauli'i at 235-5431.

KANAHA POND — Join Native Hawaiian Plant Society volunteers 7:3011 a.m. Thursdays at Kanaha Pond Wildlife Sanctuary, Maui, for weeding and brush cutting; work done also at Maui Ocean Land Trust wetlands. Call 572-6338.

MAUI TRAIL CREWS — Na Ala Hele volunteers meet Saturdays, Sundays and Tuesdays to build and clean Maui trails. Leave from Kahului Baseyard at 7:30 a.m.; bring lunch, water and sturdy shoes; tools and transportation provided. (808) 873-3509 or mark.a.peyton@hawaii.gov.

Send listings to: For the Environment, P.O. Box 156, Wailuku, HI 96793; cwilson@honoluluadver tiser.com; or fax (808) 242-1520.