### 米国：「石炭の消費減」と「天然ガス・原子力・再エネの消費増」でＣＯ2排出合理化

ＣＯ2排出原単位の面では、石炭は天然ガスよりも約82％高い。だが2016年では、天然ガス由来ＣＯ2排出量は石炭由来ＣＯ2排出量よりも10％多くなるとの見通し。

《原文より抜粋》
Energy-associated carbon dioxide (CO2) emissions from natural gas are expected to surpass those from coal for the first time since 1972. Even though natural gas is less carbon-intensive than coal, increases in natural gas consumption and decreases in coal consumption in the past decade have resulted in natural gas-related CO2 emissions surpassing those from coal. EIA's latest Short-Term Energy Outlook projects energy-related CO2 emissions from natural gas to be 10% greater than those from coal in 2016.

（出所：2016.8.17 EIA

Coal is more carbon-intensive than natural gas. The consumption of natural gas results in about 52 million metric tons of CO2 for every quadrillion British thermal units (MMmtCO2/quad Btu), while coal's carbon intensity is about 95 MMmtCO2/quad Btu, or about 82% higher than natural gas's carbon intensity.

（出所：2016.8.17 EIA