Select the greenhouse gas that fits the following description: Its concentration in the atmosphere has increased substantially over the last century, and while its total contribution to the greenhouse effect is only about 30% that of CO₂, its contribution on a per molecule basis is greater than that of CO₂. A) Water vapor B) Sulfur dioxide C) Methane D) Nitrous oxide

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Methane (CH4) has a much higher global warming potential per molecule compared to CO2, and its concentration has increased significantly due to human activities like agriculture and fossil fuel use.

Select the Greenhouse Gas That Fits the Following Description: Its