The document discusses how acid rain harms plants and forests. It begins by explaining that acid rain damages the protective outer coating of leaves, allowing acid to enter the tree and prevent photosynthesis. This can eventually kill the plant. Acid rain also harms soil by removing nutrients and leaving aluminum, which is toxic to trees. It deposits metals from the atmosphere into forests via acid rain, stunting growth of trees, mosses, and fungi that support forest growth. The document advocates taking care of plants and the environment to prevent these harmful effects of acid rain.