Question

How much amount of sulfur dioxide is caused in the atmosphere?

(a) SO2<25%

(b) 50% <SO2>50%

(c) 0%

(d) SO2>50%

This question was addressed to me in an internship interview.

My enquiry is from Environmental Aspects of Power Generation topic in division Steam Generators & Accessories of Energy Engineering

Answer 1

Correct answer is (a) SO2<25%

Best explanation: Although sulfur dioxide is caused by artificial causes, it is primary concern since it contributes <25% of all sulfur in the atmosphere. It is estimated that more than 90 million tons of sulfur dioxide are discharged into the atmosphere every year.