GATE 2024 ES – Question 21
Which is NOT a greenhouse gas in the conventional environmental classification?
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Correct answer: (C) $H_2S$
Explanation
Carbon dioxide, methane and water vapor are established greenhouse constituents in the usual climate classification. Hydrogen sulfide is treated primarily as a toxic, odorous sulfur pollutant and is the intended exception,**C**. This classification does not assert that every infrared interaction of a trace molecule is zero.