what causes water pollution?

People are the cause of water pollution, because we throw trash into the water or elsewhere unless we throw our trash in a landfill, but what we should do is recycle and put our trash in trash cans. Toxic waste from factories are thrown into water. The water containing toxic waste has never received the appropriate cleaning treatment. The fuel of boats can spill oil onto the water,and that can kill many animals living in water. Unless we stop polluting all the nice things in the world will disappear, so do not throw garbage into the water and take measures to stop the contamination of water in the world.