All events are free unless otherwise indicated.

COMING UP

NEW HILO RECYCLING CENTER, including all HI-5¢ recyclables: Mr. K's Recycle and Redemption, 815 Kino'ole St., Hilo (next to bowling alley); 7 a.m.-7 p.m. Mondays-Fridays, and 8 a.m.-5 p.m. Saturdays and Sundays; 808-969-1222.

HO'OMALUHIA BOTANICAL GARDEN SPRING PRESCHOOL ACTIVITIES, 10:30 a.m. March 17 (worms), April 21 (spiders) and May 19 (bees); with story and song time, crafts and short hike. Recommended items: rain, mud and mosquito precautions, picnic lunch and covered shoes; free; 233-7323.

"ALGAE TO OIL," film showing and discussion of University of Hawai'i efforts to use marine microalgae as a source of oil, biodiesel and other projects, 6:30-8 p.m. March 18, Temple Emanu-El; speaker, UH research scientist Hank Trapido-Rosenthal; 595-7521, www.hipl.org.

"INVASIVE MARINE INVERTEBRATES: An Underwater Investigation," one of a series of March lectures, sponsored by the UH Sea Grant Hanauma Bay Education Program, on the Hawai'i Institute of Marine Biology research facility, 6:30 p.m. March 19, Hanauma Bay Education Center theater; free (free parking after 5:30 p.m.); 397-5840.

RECYCLING COMMUNITY CLEAN-UP COLLECTION of recyclable waste, including athletic shoes, tires, cooking oil (no paint, hazardous fluids, microwave ovens, televisions or gas tanks), green waste, batteries, plastic, telephone books and magazines, 8 a.m.-2 p.m. March 21, Nanakuli High School; information/for curbside pickup or unwanted-car towing, Rene Mansho, 306-1876.

"MARCH TO THE MARSH," special Pouhala Marsh volunteer restoration and work day by Coastal America, including removing invasive species and creating habitat for endangered Hawaiian stilts, 8:30-11:30 a.m. March 21, Hawai'i Nature Center, Waipahu; bring work gloves, drinking water, hat, sunscreen and covered-toe shoes; Pauline Kawamata, 955-0100, ext. 18, or volunteer@hawaiinaturecenter.org.

"COOKING REVELATIONS WITH RAUL: FRUTTI DI MARE," seafood and spring vegetable cooking class using fresh, locally grown garden ingredients, with chef Raul Bernal, 9 a.m.-12 p.m. March 21, The Green House, 224 Pakohana St., Pauoa Valley; $35; registration, 524-8427, www.thegreenhousehawaii.com.

"THE ART OF COMPOST TEA," one of a series of UH Outreach College noncredit workshops for home and garden, 3-4:30 p.m. March 22, Olomana Gardens, Waimanalo; $20; registration/directions, 956-8400, www.outreach.hawaii.edu/noncredit.