Oceanic crust is
-
made mostly of granite
made mostly of limestone and salt
thinner than continental crust
thicker than continental crust

It is thinner than the continental crust.

Explanation:

ch3 [ch2]14cooh

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.