How does the law of conversation of mass apply to this reaction: C2H4+O2>H2O+CO2?

There are fewer oxygen atoms in the equation than hydrogen or carbon.

Explanation:

PLATO

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.