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The obvious replacement for "natural " gas is of course sewage, which is why I said we must think whole system and replace first the main use of gas - gas central heating - with district systems Sent from my iPhone > On 2 Aug 2017, at 11:09, John Whittington <[log in to unmask]> wrote: > > At 09:15 02/08/2017, Kornbrot, Diana wrote: >> Hi John, Good point. The method of electricity generation must matter. Same for electric cars! ..... I did exaggerate a bit, ratio is 91.38 = 2.4. Still not negligible ... assume that they use average footprint/kwt,hr for national grid > > Thanks. As you say, I can but presume that the figures you quote are based on the current mix of electricity generation methods. > > I am not convinced that it would necessarily be wise to encourage people to switch to gas ovens (which I think are currently pretty 'unpopular'). Give the infrequency with which people change their ovens, it would take a long time (probably decades) for such encouragement to have a substantial effect on the proportion of gas ovens and within that time scale one would hope that we would have seen appreciable further movements in the 'green' direction in electricity generation - the benefit of gas ovens will therefore presumably decrease, maybe eventually to the point of becoming 'negative' ... > > ... one needs to remember that there is potential for the carbon footprint of electricity generation to eventually become very low (primarily by removing fossil fuels from the equation). On the other hand, gas ovens (at least, as we currently know them) will presumably continue to discharge the same amounts of products of combustion into the atmosphere. One might therefore expect that the environmental benefits of electric ovens will progressively decrease, and might even become 'negative' eventually. > > ... and, of course, unless we start synthesising it (which seems unlikely, albeit not impossible), the gas will eventually run out (with, in the meantime, concerns about the possible environmental effects of increasingly desperate methods of extracting it). > > Kind Regards, > > > John > > ---------------------------------------------------------------- > Dr John Whittington, Voice: +44 (0) 1296 730225 > Mediscience Services Fax: +44 (0) 1296 738893 > Twyford Manor, Twyford, E-mail: [log in to unmask] > Buckingham MK18 4EL, UK > ---------------------------------------------------------------- > > ****************************************************** > Please note that if you press the 'Reply' button your > message will go only to the sender of this message. > If you want to reply to the whole list, use your mailer's > 'Reply-to-All' button to send your message automatically > to [log in to unmask] > Disclaimer: The messages sent to this list are the views of the sender and cannot be assumed to be representative of the range of views held by subscribers to the Radical Statistics Group. To find out more about Radical Statistics and its aims and activities and read current and past issues of our newsletter you are invited to visit our web site www.radstats.org.uk. > ******************************************************* ****************************************************** Please note that if you press the 'Reply' button your message will go only to the sender of this message. If you want to reply to the whole list, use your mailer's 'Reply-to-All' button to send your message automatically to [log in to unmask] Disclaimer: The messages sent to this list are the views of the sender and cannot be assumed to be representative of the range of views held by subscribers to the Radical Statistics Group. To find out more about Radical Statistics and its aims and activities and read current and past issues of our newsletter you are invited to visit our web site www.radstats.org.uk. *******************************************************