This study examined environmental adult education for curbing the effects of illegal oil bunkering on Ogoni land, Rivers State. It was guided by three research objectives and three research questions, The population for this study consisted of 1,499 members of 20 Community-Based Organisations (CBOS), which were drawn from farmers and fisherfolk in Gokana and Khana Local Government Areas of Rivers State, out of which 400 CBO members were sampled through a simple random sampling technique. The instruments for data collection were a validated self-developed questionnaire titled “Environmental Adult Education Programme as a Tool for Reducing Community Participation in Illegal Oil Bunkering Questionnaire (EAETRCPIOBQ)”. The instrument had a reliability index of 0.87. Data collected were analyzed using the mean statistics and standard deviation Findings revealed that poverty, unemployment, a lack of livelihood alternatives, weak institutional frameworks, and systemic corruption are central factors sustaining illegal oil bunkering in Ogoni land, despite government intervention. Community members in the area of study are environmentally aware of the impacts of illegal oil bunkering. Based on the findings, the researcher recommended, among other things, that the establishment of job programmes, skill acquisition facilities, and sustainable livelihood prospects in Ogoni land should be given top priority by the government, oil corporations, and development partners.