Final answer:
Atmospheric sulfur is primarily found as sulfur dioxide, which leaves the atmosphere as weak sulfuric acid rain, contributing to the formation of acid rain.
Step-by-step explanation:
On land, atmospheric sulfur is found in the form of sulfur dioxide (SO2). As rain falls through the atmosphere, the sulfur is dissolved in the form of weak sulfuric acid (H2SO4). The correct answer is option d. Sulfur dioxide (SO2) exists in the atmosphere and leaves the atmosphere as weak sulfuric acid rain.
The form of sulfur found in the atmosphere is sulfur dioxide (SO2), which leaves the atmosphere when it dissolves in precipitation to form weak sulfuric acid (H2SO4) rain. This process is a major component of the phenomenon known as acid rain, which can cause environmental damage by lowering the pH of lakes and other ecosystems and can lead to the chemical degradation of buildings and monuments.