[sirsar]

Methane is a far more potent greenhouse gas, and it naturally degrades into CO2 in the atmosphere. Burning methane it on the ground, even not for energy, helps mitigate the warming effect, because it is that much more potent than CO2.

[soperj]

I get that it's more potent, i wrote that in my comment. But if composting aerobically releases 50 times more CO2 than composting anaerobically does methane, then composting anaerobically is the better option.