REEF CHECK SURVEY — Join Reef Check Hawai'i for a morning kayak at 8 a.m. Saturday and survey health of reefs in Kane'ohe Bay. Meet at He'eia Boat Ramp. For inquiries or to sign up, e-mail Krista Heide at krista@reefcheckhawaii.org.

HONU GUARDIANS — Educate residents and visitors about turtle viewing at Laniakea by joining NOAA's Honu Guard program. For details, go to www.fpir.noaa.gov/PRD/prd_volunteer_opps.html.

WORM COMPOSTING — Learn vermicomposting basics at 1 p.m. today at the Manoa Gardens Elderly Housing Community Center, 2790 Kahaloa Drive; $30, includes minibin, starter colony and manual. Contact 382-0432 or waikikiworm@hawaii.rr.com.

SIERRA CLUB BEER NIGHT — Hear presentations on environmental topics and how to get involved, at Cassis, 66 Queen St.: 5:30-7:30 p.m. Aug. 22, global warming update with Jeff Mikulina; 5:30-7:30 p.m. Sept. 26, curbside recycling with Betty Gearan.

KANE'OHE WETLAND PROJECT — Help the Sierra Club clear mangrove Aug. 11 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 Deborah Blair, 955-4168.

POUHALA MARSH RESTORATION — The Hawai'i Nature Center needs volunteers to pull pickleweed and mangrove at the Waipahu marsh, 8:30-11:30 a.m. Aug. 18. 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.

THURSDAY HELPERS — Kaua'i's Limahuli Garden & Preserve seeks volunteers to restore native forest on Thursdays, 8-11 a.m. Call Lahela Correa, 808-826-1053, or Lea Taddonio, 808-332-7324, ext. 228.

CHUN'S REEF CLEANUP — Join Adopt-A-Beach Hawaii and Save The Sea Turtles International at noon Aug. 25 for a Chun's Reef Beach highway and coastal cleanup. Trash bag, gloves and purified water provided; bring hat, sunscreen, beach shoes. Meet at 61-529 Kamehameha Highway, Hale'iwa. See www.seaturtlesinternational.com or call 637-2211.

ARBORETUM WORK PARTY — Lyon Arboretum in Manoa holds a volunteer work party at 8 a.m. on the first Saturday of each month. Meet in parking lot, prepared for rain and sun; closed-toe shoes, bug repellent, hat, gloves recommended.

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