Under what conditions of temperature and pressure is a gas most soluble in water?

A gas is most soluble in water under conditions of high pressure, and low temperature.

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.