What Are the Sources of Sulfur in the Atmosphere

question 84

Multiple Choice

What are the sources of sulfur in the atmosphere?

• A) Decomposition and small amounts from pollution
• B) Mostly transportation modes, such as autos, trucks, and planes
• C) Volcanoes and hot springs, but mostly (about 75%) human activities such as burning coal
• D) Natural and human sources, in equal amounts
• E) Mostly (over 90%) volcanoes and photosynthetic bacteria

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