A new durable, biodegradable plastic breaks down in seawater, offering a potential solution to microplastic pollution. This material, based on supramolecular structures, can be tailored for different uses and is fully recyclable, enhancing its environmental benefits. New Sustainable Plastic Res
But the problem is that phosphorus and nitrogen are actually bad for aquatic ecosystems: https://www.unep.org/news-and-stories/story/what-phosphorus-and-why-are-concerns-mounting-about-its-environmental-impact