The sulfur is emitted from the source. Usually in the form of Spk. Various h2s, so2 into the atmosphere. Reaction with oxygen and moisture in the air. Would fall to the ground as two types.
After sulfur released from Genesis, often in the form of EST. Such as H2S, SO2 into the atmosphere. When the reaction with oxygen and moisture in the air, it is OK to fight the ground 2.
After the sulfur is emitted from a variety of sources, often in the form of a book, such as H S 2, 2 SO into atmosphere. When you do react with oxygen and moisture in the air, it will be OK to fight ground. Is 2.