image: Aerial view of the Baring Head clean air monitoring site in NZ; part of the global network for methane isotope studies. This material relates to a paper that appeared in the March 11, 2016 issue of Science, published by AAAS. The paper, by H. Schaefer at National Institute of Water and Atmospheric Research in Wellington, New Zealand, and colleagues was titled, " A 21st century shift from fossil-fuel to biogenic methane emissions indicated by 13CH4." view more
Credit: Dave Allen, NIWA