The factor of 25 accounts for this - over a 100-year timespan, methane is 25x wo...

		strommen on Dec 29, 2015 \| parent \| context \| favorite \| on: Why Engineers Can’t Stop Los Angeles' Enormous Met... The factor of 25 accounts for this - over a 100-year timespan, methane is 25x worse than the equivalent weight of CO2. Over a shorter 20-year timespan, it is 86x worse. https://en.wikipedia.org/wiki/Global-warming_potential#Value...