Plastic bags can end up in the ocean and can choke whales, seals, dolphins, turtles, penguins, dugongs, fish and seabirds if they are swallowed. Supermarkets use millions of plastic bags each year and many can end up in the oceans and waterways. You can help reduce the amount of plastic bags that are used by taking your own bag with you and reusing it again and again. String or cotton bags are popular and are gentler on your hands too!