Departamento ng Kapaligiran ng San Francisco  (San Francisco Department of the Environment) 

Methane Math: How Cities Can Rethink Emissions from Natural Gas

Methane Math: How Cities Can Rethink Emissions from Natural Gas presents evidence that the short-term global warming potential of methane coupled with higher than previously estimated natural gas leak rates means that sunny assumptions about coal-to-gas switching should not serve as the basis for climate policy. The report provides ten priority actions local governments can take to better account for the impact of natural gas while accelerating the transition to 100% renewable energy.