Marine plastic pollution is a massive environmental issue, with a plastic smog of an estimated 170 trillion particles afloat in the world’s oceans. This highlights how urgently we need to develop strategies to mitigate this environmental crisis. Marine plastic pollution is a massive environmental issue, with a plastic smog of an estimated 170 trillion particles afloat in the world’s oceans. This highlights how urgently we need to develop strategies to mitigate this environmental crisis. Environment Phys.org – latest science and technology news stories