Neutral grain spirit is the same as

neutral spirits can be produced from grains, corn, grapes, sugar beets, sugarcane, tubers, or other fermented plant materials. ... A product made from grain is "grain neutral spirit", while a spirit made from grapes is called "grape neutral spirit" or "vinous alcohol"

Explanation:

may i ask why an drink ?

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.