Acid rain is a bad thing that happens when pollution from factories and cars goes up into the sky and mixes with the rain. When acid rain falls on forests and plants, it hurts them by making the soil too acidic. This can hurt the trees and plants' roots and make it hard for them to get the things they need to grow. Acid rain also goes into rivers and lakes, which can make the water too acidic and kill the fish and other creatures that live there. That's why it's important to stop pollution and help protect the environment!
