The document discusses garbage islands, also known as the Great Pacific Garbage Patch, which is a massive area of marine debris trapped in the North Pacific Ocean by ocean currents. It contains high amounts of plastics, chemicals, and other trash, making it the largest landfill in the world. Around 10% of the plastic produced annually ends up in oceans, where it damages marine life and ecosystems. This plastic is eventually eaten by fish and smaller organisms, entering the human food chain and posing health risks. While efforts are underway to prevent further growth, fully cleaning up the patch is extremely challenging due to its vast size and remote location in international waters.