One of the differences is that decomposing happens in the form of Methane, which is a potent greenhouse gas (21x as potent as CO2). Capturing and burning the m

One of the differences is that decomposing happens in the form of Methane, which is a potent greenhouse gas (21x as potent as CO2). Capturing and burning the methane "downgrades" the potency of the emissions, now only emitting CO2.