Residence time of methane in the atmosphere is?

Explanation

Methane (CH₄) is a greenhouse gas that traps heat in the atmosphere, contributing to climate change.It is emitted from various sources, including agriculture, waste decomposition, fossil fuel extraction and use, and biomass burning.Once released, methane undergoes chemical reactions in the atmosphere, primarily with hydroxyl radicals (OH). This process breaks down methane and removes it from the atmosphere.However, this removal process takes time. The average residence time of methane in the atmosphere is estimated to be between 9 and 12 years, although estimates can vary based on factors like atmospheric conditions and location.Therefore, options (a), (b), and (d) are incorrect because they significantly underestimate the actual residence time of methane.(Environmental chemistry,Introduction and Types of Pollution Factors affecting Water Quality )