How to Give Up PlasticBy: Will McCallum 'We have a responsibility, every one of us' David Attenborough Around 12. 7 million tonnes of plastic are entering the ocean every year, killing over 1 million seabirds and 100,000 marine mammals. By 2050 there could be more plastic in the ocean than fish by weight. But how can YOU make a difference? This accessible guide will help you make the small changes that make a big difference, including: Using a wash bag to catch plastic