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Natural Gas Must Be A Hydrocarbon Fuel

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Although natural gas could be a hydrocarbon fuel, the global warming emissions from its combustion are much lower than oil.
Natural gas emits 50 to 60 % less greenhouse gas. Considering only tailpipe emissions, natural gas additionally emits 15 to 20 % less heat-trapping gases than oil when burned in today’s typical vehicle
Emissions from smokestacks and tailpipes, however, don 't tell the complete story.
The drilling and extraction of natural gas from wells and its transportation in pipelines, ends up in the leakage of methane, a way more potent global warming gas than carbon dioxide. Preliminary studies and field measurements show that these questionable “fugitive” methane emissions vary from 1 to 9 % of total life cycle emissions.
Whether natural gas has lower life cycle greenhouse gas emissions than oil depends on the assumed leakage rate, the global warming potential of methane over different time frames, the energy conversion efficiency, and different factors
Cleaner burning than different fossil fuels, the combustion of natural gas produces negligible amounts of sulfur, mercury, and particulates. Burning natural gas will manufacture nitrogen oxides, that are precursors to smog, however at lower levels than oil and diesel used for motorcars.
However, despite these advantages, unconventional gas development will have an effect on native and regional air quality. Some areas where drilling happens have experienced increases in concentrations of unsafe air pollutants

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