Thursday, April 18

Northampton County Conservation District’s free ENVIROTHON “Renewable Energy for a Sustainable Future” competition between students in grades nine through 12. Quiz topics include aquatic ecology, forestry, soils and land use, wildlife and the current issues from study and reference materials. 8:30 a.m. to 2 p.m. Louise Moore Park, 151 Country Club Road, Easton.

The local winner advances to the state competition.

Lafayette College’s EarthFest celebration. Free. Clubs, organizations, local vendors. 1 to 5 p.m. Campus quad, 730 High St., Easton. Parking available on the top level of the Markel Parking Deck. Visit calendar.lafayette.edu/node/65383; for other events, visit /sustainability.lafayette.edu/events/earth-month/

L.U.A.G. - Art in Dialogue: Artist Talk with Nick Brandt, environmental photographer, about his epic panoramic landscapes featured in Inherit the Dust and This Empty World. 6 p.m. Zoom.

Information: visit https://luag.lehigh.edu/event/current/art-dialogue-artist-talk-nick-brand

Friday, April 19

Fifth annual Youth Climate Summit of the Lehigh Valley. Free. 9 a.m. to 4 p.m. Middle and high school students explore strengths and interests, speak with experts and climate professionals, engage in hands-on climate solutions activities, learn about sustainability and climate careers, develop related skills and more. Food provided. Nurture Nature Center, 518 Northampton St., Easton. For more information and to register, visit nurturenaturecenter.org/youth-climate-summit-of-the-lehigh-valley/

Saturday, April 20

Historic District Cleanup Day. All age – under 16 must be accompanied by an adult. 9 to 11 a.m., Breakfast, T-shirt, and supplies provided. In honor of Earth Day, the Downtown Bethlehem Association is hosting the annual event to spruce up our Historic District. Breakfast included. 9 to 11 a.m. Must sign up; visit signupgenius.com/go/10C0B48A5AE2AAB9-48281113-historic?fbclid=IwAR0wcwAS9HBnNgi63mf1gl_wK612yi3r_-cMRdZAkux4kzTatnmityHUBrg#/; registration at 9 a.m. at Luckenbach Mill, 459 Old York Road.

L.V. Trash Pact clean up in parking lot. Gloves and garbage bags provided, 12:30 p.m. Hot Yoga Hut, 2108 W. Union Blvd. Other days and locations available. Information and sign up: visit volunteersignup.org/8KEWT

Sunday, April 21

The History of Earth Day. 1 to 2 p.m. National Museum of Industrial History, 602 E. Second St. Visitwww.nmih.org

Earth Day Fun Day. Vegan food vendors: Butterhead Kitchen, Paranormal Pop Ups and Desserts by Taryn. Live music by Zach and Aaron Duo. Family and dog friendly. Raffles and 50/50 drawing. Proceeds benefit Animal Defenders Greater Lehigh Valley. Noon to 4 p.m. Hop Hill Brewing, 1988 Blair Ave., Bethlehem.

No Planet B Jamboree: free live music with Galen Deery & Mystik Fool, Clover and Moustapha Noumbiis. Eco-friendly. Raise sustainability awareness and the importance of taking care of the planet. Food and beverages available for purchase from The Sun Inn’s food truck on site. Free. 2 p.m. Back of the Sun Inn Courtyard, 564 Main St.

Ice House – Sand Island area cleanup with the Metropolitan Community Church of the L.V. group. Meet at the Ice House. 1 to 3 p.m. All welcome; children under the age of 18 must be accompanied by a parent or guardian. 56 River St. Email: RevGoudy@mcclv.info

Earth Day Planting at Louise Moore Park. Join Kate Ebel, Senior Restoration Ecologist with Wildlands Conservancy, on a free conservation tour of Louise Moore Park followed by a spring planting. Gloves and shovels provided. No dogs allowed. 1 to 3 p.m. Registration required: visit engage.wildlandspa.org/calendar/event/55

Monday, April 22 - Earth Day

L.V. Trash Pact cleanup 2 p.m. at Yosko Park, 610 Atlantic St. Garbage bags, gloves provided. Visit https://volunteersignup.org/TBQ7M

Earth Day 2024: “Planet vs. Plastics,” environmental protection and climate action to raise awareness about plastic’s harm to human and biodiversity. Visit EarthDay.org

Celebrate Earth Day with Bethlehem Area School District Spanish teachers. Outside near the Tea House (bring a blanket for seating), weather permitting; or in the Youth Department on the second floor of the library if it rains. 6 p.m. All ages; children must be with a responsible adult. Free. Main library, 11 W. Church St. Information: visit bethlehemarea.librarycalendar.com/event/earth-day-celebration-basd-spanish-teachers-11810

Friday, April 26

Lehigh University celebrates Earth Month: Earth Day fair. 10:30 a.m. to 1 p.m. on the STEPS Lawn. Learn from myriad booths showcasing sustainability clubs, initiatives, programs and departments from around campus. Information for all 2024 Earth Month events: visit https://sustainability.lehigh.edu/earth-month

Free different species tree seedlings (one per person- first come, first served) at Bethlehem’s City Hall, 10 E. Church St. 8:30 a.m. to 4 p.m. These seedlings cannot be planted between the curb and the sidewalk because they do not meet the size requirement for street trees.

Saturday, April 27

L.V. Trash Pact cleanup 10 a.m. at Elmwood Park, 820 Dellwood St. Garbage bags, gloves provided. Visit volunteersignup.org/ to register.

Sunday, April 28

L.V. Trash Pact cleanup 2 p.m. at Dimmick Park, 570 Durham St., Hellertown. Garbage bags, gloves provided. Visit volunteersignup.org/8P337 to register.

Tuesday, April 30

The Dual Challenge of Energy and Climate presented by Scott Tinker. 8:10 a.m. to 9:30 a.m. Lehigh University, Neville Hall, Auditorium 1; visit cas.lehigh.edu/content/dual-challenge-energy-and-climate-talk-scott-tinker