Trees can not absorb naturally occurring aluminum, but acid rain may convert it to aluminum sulfate or aluminum nitrate. These can be absorbed by the trees, and may adversely affect them. Acid rain has not been shown to be harmful to human health, but some studies are considering whether some of the particles which can be formed from sulfate and nitrate ions can affect respiration. Acid deposition has also caused deterioration of buildings and monuments. Many of these are built of stone, that contains calcium carbonate.
Marble is one such material.
The acid rain can turn the calcium carbonate to calcium sulfate. The calcium sulfate can crumble and be washed away. Sulfates may also damage bronze statues. They are one cause of the greenish streaks often seen on outdoor statues.