Pollution all over the World?

Do you know if we don't look after our rivers and Forests they'll end up being polluted or just have rubbish,like plastic bags or any kind of rubbish,You never know other animals might eat the plastic because people that either catch fish,they must throw their plastic into the ocean cause they think its ocean material? Birds,fish,whales,seals and turtles eat small - big chunks of plastics cause there is a lot of plastic that are in the ocean. But over 1 billion seabirds are dying because they eat that much plastic. I think we shouldn't be littering, Just pick up rubbish.