Yet another myth gone?

Now the forests are producing greenhouse gases...

But what if trees, in addition to taking in CO2,
also emit a greenhouse gas of their own?

That scenario is sketched in a new study by
European scientists, which if confirmed, would be
one of the biggest upheavals in climate science
for years.

It would also inflict a serious blow to Kyoto,
one of whose key pillars is the faith in "sinks",
as forests are called in the treaty's jargon.
...
Until now, the mainstream belief is that
atmospheric methane chiefly comes from bugs: from
bacteria working in wet, oxygen-less conditions,
such as swamps and rice paddies.

Full article.