Trash is bad for our bodies of water and to the animals. Fish, ducks and other animals eat plastic that harm them. Plastic takes a long time to get rid of so there will a lot of animals affected by the plastic and the waste that humans throw in the water.
Oil is important because oil is used for transportation, to make plastic and chemicals. We need to use oil carefully because it takes millions of years to reproduce.
We need trees to produce oxygen for us to inhale and for them to inhale the carbon dioxide that we exhale. Without trees to produce oxygen, us humans and animals will not able to live.