For instance, these models couldn't have accounted for the shale gas revolution in the U.S., which has led to rapid reductions in emissions at great benefit to its economy nor for the costs and difficulties of integrating highly intermittent renewables into Germany's electrical grid. (scientificamerican.com)
Where the Shale Gas Revolution Came From: Government's Role in the Development of Hydraulic Fracturing in Shale by Michael Shellenberger, Ted Nordhaus, Alex Trembath, and Jesse Jenkins, May 2012 (thebreakthrough.org)
Source: Alex Trembath, Jesse Jenkins, Ted Nordhaus, and Michael Shellenberger, «Where the Shale Gas Revolution Came From: The Role of Government in the Development of Hydraulic Fracturing in Shale,» May 2012. (brightsourceenergy.com)