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EPA says methane emissions from natural gas production have dropped 36% from 2007-2011

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(The figure includes the direct effects and those indirect effects due to the production of tropospheric ozone and stratospheric water vapor.) Routine maintenance emissions originate from pipelines, equipment, and wells during repair and maintenance activities. In 2011, CH4 emissions from coal mining were 63.2

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New Comprehensive Lifecycle Energy and Emissions Inventory Includes Non-Operational Components; Large Aircraft Can Perform Better than Light Rail

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This includes raw materials extraction, manufacturing, construction, operation, maintenance, and end of life of vehicles, infrastructure, and fuels. Utilizing higher percentages of electricity from hydro and other renewable sources for rail operations could result in significant GHG reductions over fossil-based inputs such as coal.

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