A new study out by NOAA and the University of Colorado at Boulder reconfirms their findings from February 2012, showing methane leakage from gas drilling is much higher than the gas industry claims, and is more in line with the levels used in a Cornell study that concluded that gas is no panacea for climate change.  While scientists concluded years ago that leakage rates would need to be 2% or less to help avoid catastrophic climate change, the NOAA levels were double that, sometimes going as high as 9%.  Think Progress and the science journal Nature report on the findings.