Beach and waterway cleanups run nationally, with every piece of rubbish collected logged into a national database used to track pollution sources. Visit https://www.tangaroablue.org

No event, no sign-up, no group required: just pick up three pieces of rubbish next time you're at the beach, a park, or anywhere outdoors, and you've done it. A genuinely lower-effort habit rather than a program to join. Visit https://www.take3.org

Local groups called Collectives that run cleanups, tree plantings, and citizen science together, a regular crew rather than a one-off event. Currently active in Melbourne, Geelong, Mornington Peninsula, and North-East Victoria; Sydney, Northern Rivers, and Tamworth in NSW; Brisbane, Gold Coast, Sunshine Coast, Cairns, and Townsville in QLD; plus Hobart, Perth, and Adelaide. Visit https://www.coexistaus.org/join-a-collective

A national Landcare network built specifically for young people, running tree planting days, bush regeneration, and other hands-on conservation work in a social, peer-aged group setting. A good alternative if there's no Co-Exist Collective running near you yet. Visit https://intrepidlandcare.org