Why Have Methane Levels Become Stable?

Back in September there was a report that atmospheric methane levels have stabilized since 1999 because so much swampy land was lost to either development or drought and not because of emission reductions from human sources based on measurements of methane emissions from various sources. However, the BBC now reports that scientists who have published a paper in the journal Geophysical Research Letters speculate that measures taken by humans to reduce methane emissions such as reducing methane released from gas pipelines, paddy fields, and landfill sites might be the explanation. It would be nice if our efforts to reduce methane emissions are really working but I am more inclined to believe the findings of the first report that blames the loss of swampy land.