The lifespan of methane in the atmosphere was estimated at 9.6 years as of 2001; however, increasing emissions of methane over time reduce the concentration of the hydroxyl radical in the atmosphere.
A vida media do metano na atmosfera estimouse en 2001 como de 9,6 anos; porén, as crecentes emisións de metano co tempo reducen a concentración do radical hidroxilo na atmosfera.