Comment on

• Contribution of anthropogenic and natural sources to atmospheric methane variability.

  Bousquet P, Ciais P, Miller JB, Dlugokencky EJ, Hauglustaine DA, Prigent C, Van der Werf GR, Peylin P, Brunke EG, Carouge C, Langenfelds RL, Lathière J, Papa F, Ramonet M, Schmidt M, Steele LP, Tyler SC, White J. Bousquet P, et al. Nature. 2006 Sep 28;443(7110):439-43. doi: 10.1038/nature05132. Nature. 2006. PMID: 17006511