Acid Rain has effected the black forest in Germany. The black forest got destroyed by acid rain because the soil of the trees in the forest is acidic soil and it is low, so it is near neutral. The soil has a low acidic level. When acid rain drops it has a high level of acid.
My school has a question like this. This was my answer to the effects on Germany's black forests.
(if i am wrong i do apologize.)
(hope i helped!)