“Reuse it or Refuse it. Beat Plastic Pollution.” Plastics are used on a daily basis throughout the world. Plastics are inexpensive, lightweight, strong durable, corrosion-resistant materials, with high thermal and electrical insulation properties. Substantial quantities of plastic have accumulated in the natural environment and landfills. Around 10 percent by weight of the municipal waste stream is plastic. Pre-experimental one-group pretest-posttest design for selecting samples. The setting of the study was a rural community in Arumanai in Kanniyakumari District. The sample consists of 170 adults who met the inclusion criteria. A convenience sampling technique was used for the selected samples. Ethical aspects of the study were maintained throughout the study. A modified structured questionnaire was used as a tool for data collection. The tool's reliability was tested before the pilot study. The first pretest was conducted to assess the level of knowledge regarding the hazards of plastics and the prevention of their usage. The video-assisted teaching program was implemented in the group for 25 minutes and a posttest was conducted on the 7th day, to reassess the level of knowledge regarding the hazards of plastics and prevention of its usage. The data gathered were analyzed by both descriptive and inferential statistics based on the objectives of the study. The study revealed that 42.9% of adults had excellent knowledge, and 57.1% had very good knowledge regarding the hazards of plastics and the prevention of their usage. The mean level of knowledge regarding the hazards of plastics and the prevention of their usage increased from 11.2 to 19.8 after the implementation of the video-assisted teaching program. The mean increase was statistically significant at 0.01 level (t=59.174, df= 16). There was a significant effect of the video-assisted teaching program regarding the hazards of plastics and the prevention of their usage among adults residing in Arumanai.