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Simon's right. And the authors of the report on trees emitting methane are incensed by the media's misrepresentation of their work. See http://www.scoop.co.nz/stories/SC0601/S0...
for more details. The authors concluded that their work shows that trees are up to 4% less efficient as a carbon sink than previously thought. Insignificant.
As for co2balance.com, this is not a profit-making body. It was set up and funded by 4 friends and is run in our spare time. No-one has taken a penny in remuneration, something that not many charities can boast.Mike Rigby, 15 years ago.