This report investigates the impact of micro-plastics on the marine environment. It begins by defining micro-plastics and then explores their various sources, including industrial processes, fishing nets, plastic bags, soda bottles, and cosmetics, as well as dust and product emissions. The report details the distribution of micro-plastics in the ocean, including surface waters, coastal waters, estuaries, water columns, beaches, and deep-sea sediments. It then analyzes the ecological impacts, such as sub-lethal effects on marine life, alteration of benthic communities, the release of harmful chemicals, and the introduction of alien species. The report concludes by highlighting the need for further research and action to mitigate the spread of micro-plastics in the world's oceans, emphasizing the significant ecological, economic, and societal consequences.