How Did Monsoon Affect Methane?
		q Orbital procession affects solar radiation at low latitudes       è solar radiation affects the strength of low-latitude monsoons       è monsoon fluctuations changes the precipitation amounts in Southeast Asia       è heavy rainfalls increase the amount of standing water in bogs       è decaying vegetation used up any oxygen in the water and creates the oxygen- free conditions needed to generate methane       è the extent of these boggy area must have expanded during wet monsoon maxima and shrunk during dry monsoon minima.