If the fish eat the sewage and then we catch them to eat them, they are infected by our pollution and we get sick from them. This is just the act of the food chain. Oil spills are also a big problem. It cuts off the oxygen in our water so the water life can t breath and they die. And if the water life is all gone it goes up the food chain and effects each and every one of us.
Garbage is also a big factor in the pollution game.
It falls in the gutter and travels through the sewage systems and ends up in our fresh or salt waters. Many fish and other water life die by garbage. The plastic rings that they use with pop cans sometimes get caught on the fish and they strangle to death. Oil spill are also hazardous, the oil cuts off the oxygen and gets in fish and other animals and when we eat them, they make us sick. Sewage, Oil spills, Garbage, all of this is kill the water life, but it is not only them, but humans to.