Japanese researchers developed an environmentally friendly plastic that degrades in seawater, addressing microplastic pollution. The new material is strong, biodegradable, and breaks down completely in salt water and soil, offering a sustainable alternative to conventional plastics while avoiding environmental contamination. Key features include recyclability, non-toxicity, and adaptability for various applications like 3D printing and medical uses. The innovation provides a promising solution to reduce microplastic accumulation in oceans and ecosystems.