Many tall buildings have a
framework made of steel
girders on which walls of brick
and glass are built. If the steel
was unprotected what would
you expect to happen in time?
Explain your answer.

I would expect it to rust erode and fall down, but thats just a guess.

Explanation:

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.