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<blockquote data-quote="holwellcourtfarm" data-source="post: 7663024" data-attributes="member: 42914"><p>That's quite a useful summary, especially for FCRN! It does largely ignore a major point though except in passing in this foornote:</p><p></p><p><em>A distinction emerges here between biogenic methane (methane from biological sources such as agriculture or wetlands) and fossil methane (‘natural gas’ leakage). For biogenic methane, this CO2 resulting from methane breakdown does not represent an additional source of carbon in the atmosphere, <strong>while for fossil methane it does.</strong> For further information on the breakdown of methane, including this point, see section 3 of our explainer </em><a href="https://www.tabledebates.org/building-blocks/agricultural-methane-and-its-role-greenhouse-gas" target="_blank"><em>Agricultural Methane and its Role as a Greenhouse Gas</em></a></p><p></p><p>A significant proportion of methane being emitted around the world is NOT from enteric fermentation of ruminants. Some is from fossil sources (VERY bad as it is adding prehistoric CO2 when it degrades so acts like methane in the short term and fossil CO2 in the long term). Most of this is from leakage from the oil and gas industry, now thought to be at least 10x greater than they have hitherto admitted. Some is from rice cultivation. Some is from landfills. Some is from mains gas leakage (fossil source again at present). Some is from termites. A rapidly increasing source is from melting permafrost releasing cthallates. </p><p></p><p>If we are going to decide to buy time by cutting methane surely we must cut ALL of these as well?</p><p></p><p>And, if we do so, we MUST THEN RAPIDLY CEASE FOSSIL FUEL USE or we have just wasted the time gained.</p></blockquote><p></p>
[QUOTE="holwellcourtfarm, post: 7663024, member: 42914"] That's quite a useful summary, especially for FCRN! It does largely ignore a major point though except in passing in this foornote: [I]A distinction emerges here between biogenic methane (methane from biological sources such as agriculture or wetlands) and fossil methane (‘natural gas’ leakage). For biogenic methane, this CO2 resulting from methane breakdown does not represent an additional source of carbon in the atmosphere, [B]while for fossil methane it does.[/B] For further information on the breakdown of methane, including this point, see section 3 of our explainer [/I][URL='https://www.tabledebates.org/building-blocks/agricultural-methane-and-its-role-greenhouse-gas'][I]Agricultural Methane and its Role as a Greenhouse Gas[/I][/URL] A significant proportion of methane being emitted around the world is NOT from enteric fermentation of ruminants. Some is from fossil sources (VERY bad as it is adding prehistoric CO2 when it degrades so acts like methane in the short term and fossil CO2 in the long term). Most of this is from leakage from the oil and gas industry, now thought to be at least 10x greater than they have hitherto admitted. Some is from rice cultivation. Some is from landfills. Some is from mains gas leakage (fossil source again at present). Some is from termites. A rapidly increasing source is from melting permafrost releasing cthallates. If we are going to decide to buy time by cutting methane surely we must cut ALL of these as well? And, if we do so, we MUST THEN RAPIDLY CEASE FOSSIL FUEL USE or we have just wasted the time gained. [/QUOTE]
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