Who does plastic pollution affect and how?

Plastics are organic polymers with extremely low reactivity towards the environmental factrs, thus have the ability to remain intact for around 25,000-50,000 years on the earth, without decomposing. Now the question is; if we kept on manufacturing more and more plastic on a daily basis, without doing something about decomposing it, what will we do with a world full of plastic scrap in 20-25 years. That why scientists are urging people to use decomposable plastics and recycle the one already made. Also, some plastics are toxic to wildlife and marine life.