Single-use plastic bags are used at most a few times before they (throw) away. It takes them hundreds of years (break) down. Many of these bags end up in the ocean where larger ones can trap sea creatures, such as turtles and dolphins. Over time, the bags fall apart into countless tiny pieces, and fish can (accidental) eat some of them. Now, lots of (country) and regions are taking action to ban the sale of such bags to stop people using them.
