See a comprehensive listing at www.honoluluadvertiser.com/islandlife.

SPECIAL

FREE UNLIMITED eWASTE RECYCLING EVENT, a collection of electronics from both businesses and the public, (including computer, monitors, laptops, printers, fax machines, servers, telecom equipment — no TVs, batteries or micro-waves) sponsored by Pacific Corporate Solutions, and collection of canned food for Hawai'i Foodbank – 8 a.m.-3 p.m. April 10, Leeward Community College, main parking lot; information, 722-3931, www.ewastehawaii.com.

"MAUKA TO MAKAI ENVIRONMENTAL EXPO," showcasing environmental efforts by more than 20 city, state and federal agencies, with emphasis on water resources, mauka to makai; with family-friendly, hands-on educational displays, including picture-taking with Opoha the 'O'opu, water pollution prevention games, nature resource arts and crafts, a fish release, and free native plants (limited); 9 a.m.-2 p.m. April 10, Waikiki Aquarium; information, 923-9741.

"HAWAI'I'S NATIONAL PARKS: AN ENVIRONMENTAL RESEARCH LABORATORY," one of a series of Hawai'i Volcanoes National Park "After Dark in the Park" presentations, with speech by University of Hawai'i climatologist Tom Giambelluca, on research in the extensive variety of environments represented in Hawai'i Volcanoes and Haleākala national parks, including effects of climate change on trade winds and impacts of invasive plants on water resources, 7 p.m. April 6, HVNP Kīlauea Visitor Center auditorium, Big Island; $1 donation (park entrance fees apply); information, 808-985-6011.

EARTH DAY IN KAILUA, with 20 groups hosting free education exhibits and activities (including keiki events such as hands-on watershed model, wetland bird guessing games, and planting native trees), and workshops (rain barrel construction , 10:30-11:30 a.m., $5 lecture fee, $30 materials; and Native Hawaiian Plant Workshop and Kaha Garden tour, 12:30-1:30 p.m.; free); and sale of native plants; 10 a.m.-2 p.m. April 10, Kawainui Neighborhood Park, Kailua (750 Kaha St., at Kihapai Street); information/workshop reservations, 381-7202, www.huihawaii.org.

UPCOMING

FREE SOLAR EDUCATION SEMINAR, sponsored by solar electric/hot water systems provider, RevoluSun, on how solar works, available systems, and available tax credits/incentives, 6:30-8:30 p.m. April 8 and 27, Waimea Valley, Pīkake Pavilion; free, open to the public; information, 748-8888 or www.RevoluSun.com

DUKE'S WAIKIKI REEF AND OCEAN EXPO, for fishermen, surfers, ocean enthusiasts, and the public, with exhibits on ecosystem management, box jellyfish, invasive algae, coral reefs, water safety and more, 11 a.m.-1 p.m. April 9, Duke's Waikiki restaurant, Outrigger Waikiki Hotel; free; 922-2268.

"THE TIMELESSNESS OF HAWAI'I'S FORESTS," one of a series of forestry forums presented by the Hawai'i Forest Institute, with Kaua'i's natural resources and forestry community – including the National Tropical Botanic Garden and Nature Conservancy – with an overview of Kaua'i's forests and ongoing projects (wilderness to urban forestry), 10 a.m.-12 p.m. (morning session) and 1-2:30 p.m. (field trip), April 9, Kukui'ula Village shopping center, Po'ipū, Kaua'i, mauka side; free; information, 933-9411, www.hawaiiforestinstitute.org/our_pro jects/forestry_forums.php.

ALOHA 'ĀINA EARTH DAY, one of a series of recycling community cleanup collections of recyclable waste, including athletic shoes, tires, cooking oil, green waste, batteries, plastic, telephone books and magazines (no paint, hazardous fluids, microwave ovens, TVs or gas tanks), 8 a.m.-2 p.m.; April 10, Leilehua High School and April 24, Kalani High School; information/for curbside pickup or unwanted-car towing, Rene Mansho, 306-1876.

SIERRA CLUB KĀNE'OHE BAY SERVICE PROJECT, 1 mile, moderately difficult hike, April 10, Marine Corps Base Hawaii; reservations (by April 8)/time: 235-5431.

INVASIVE SPECIES (MICONIA) SURVEY, O'ahu Invasive Species Committee, strenuous, off-trail, miconia survey hike, April 10, leaves from Church of the Crossroads; bring lunch and water, and wear long sleeves and sturdy shoes; registration (by April 8)/time, 286-4616.

100th SOLAR OPEN HOUSE, sponsored by Sunetric solar company, 11 a.m.-3 p.m. April 10, LaRue residence, 792 Mōkapu Boulevard, Kailua; information, 255-5868, www.Sunetric.com.

WORM WORKSHOP and tour, sponsored by city Board of Water Supply, on using worms to help make organic waste become garden compost, 10 a.m.-12 p.m. April 10, Hālawa Xeriscape Garden; $30 (includes a mini-bin, worm starter colony and manual; registration, 945-9676.

BE A GREENIE

FREE GARDEN MULCH, 9 a.m. to 3 p.m. Saturdays, Hālawa Xeriscape Garden, 99-1269 Iwaena St., self-service; www.boardofwatersupply.com, 748-5041.

HONEYBEE VARROA PROJECT, an islandwide study by the University of Hawai'i College of Tropical Agriculture and Human Resources, asks anyone seeing a wild honeybee colony on O'ahu to call 956-2445; for information, see www.ctahr.hawaii.edu/HoneyBeeVarroa.

FRESH DAYS, sponsored by Kaiser Permanente; shop for affordable, fresh, locally grown produce; information, 432-2270:

• Honolulu Clinic, 9 a.m. to 12:30 p.m. Thursdays, main entrance and lobby area.

• Moanalua Medical Center, 9 a.m. to 12:30 p.m. Wednesdays, main entrance.

• Waipi'o Clinic, 9 a.m. to 12:30 p.m. Wednesdays, front entrance and main lobby.

CITY PEOPLE'S OPEN MARKETS: 25 sites offering weekly sale of agricultural and aquacultural products, ethnic and other food items; information, www.honolulu.gov/parks/programs/pom, 522-7088.

SIERRA CLUB is looking for hike/outing leaders (information, Stan Oka, 429-9814, or Deborah Blair, 955-4168), and for people to sign up as new Facebook friends; information, 538-6616.

KAUA'I GARDEN HELP, volunteers needed to protect rare plants and ecosystems at National Tropical Botanical Garden on Kaua'i; help needed in administration, conservation, education, development, etc.; 808-332-7324, ext. 228, or volunteer@ntbg.org.

MAKIKI FOREST RESTORATION PROJECT, the O'ahu Nā Ala Hele Trails and Access program needs volunteers to weed, pick up branches, plant, water and fertilize native plants as part of the Makiki Watershed Awareness Initiative forest restoration project. Bring long pants, long-sleeved shirt, shoes or boots, gloves, insect repellent, water and lunch; families welcome; 9 a.m. to 2 p.m., selected Saturdays monthly; meet at Makiki forestry base yard above new Hawai'i Nature Center (from Makiki Street, take a left onto Makiki Heights Drive; the area entrance is before first hairpin turn); 973-9782.

Niaulani Forest WorkDay, volunteers needed to preserve the rainforest; 9 a.m to noon third Sunday of each month, Volcano Art Center, Niaulani campus, Volcano Village, Big Island; 808-967-8222.

TUESDAYS AT KANAHĀ, weekly beach cleanup and plant maintenance, coordinated by Community Pride at Kanahā Beach Park, Maui; 8 to 10 a.m. Tuesdays, at the park; Valerie Vines Magee, 808-264-1454.

CHUN'S REEF BEACH/COAST CLEANUP, by Adopt-a-Beach Hawaii and Save the Sea Turtles International; noon last Saturday monthly, from 61-529 Kamehameha Highway, HaleNormal'iwa; trash bag, gloves and purified water provided; bring hat, sunscreen and beach shoes; 637-2211.

WAIMEA VALLEY offers daily guided activities, including wildlife walks, history walks, native plant walks; fees; information, www.waimeavalley.net, 638-7766.