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- W2921264353 abstract "Natural gas is a fossil fuel accounting for about 30% of US primary energy consumption. Climate change is one of the primary environmental issues associated with natural gas use: natural gas combustion releases carbon dioxide. A less emphasized issue is that natural gas is mostly methane, a potent greenhouse gas (GHG). The climate impact of natural gas use is thus sensitive to the amount of methane that escapes from the natural gas system unburned. We call attention to three considerations for modeling natural gas-related methane emissions in life cycle assessment (LCA). First, natural gas system methane leakage is inconsistently characterized and likely systematically underestimated by commonly used life cycle inventory (LCI) databases. Second, studies are often imprecise in assumptions about process boundaries. This matters because not all natural gas uses rely on the same infrastructure and induce the same methane leakage. Third, there is not yet a stable estimate for the global warming potential (GWP) of methane. Newer estimates tend to be larger, which further exacerbates the underestimation of GHG impacts from natural gas systems. Data uncertainty is common in LCA, but natural gas-related methane emissions deserve special attention due to their influence on a decision-relevant parameter (GHG intensity) in product systems across the economy." @default.
- W2921264353 created "2019-03-22" @default.
- W2921264353 creator A5084163439 @default.
- W2921264353 creator A5088433739 @default.
- W2921264353 date "2019-06-01" @default.
- W2921264353 modified "2023-09-26" @default.
- W2921264353 title "Three considerations for modeling natural gas system methane emissions in life cycle assessment" @default.
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- W2921264353 doi "https://doi.org/10.1016/j.jclepro.2019.03.096" @default.
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