On Mon, Dec 8, 2014 at 8:55 AM, Simon King <simon.k...@uni-jena.de> wrote: > Hi, > > On 2014-12-08, parisse <bernard.pari...@ujf-grenoble.fr> wrote: >> Le lundi 8 d=C3=A9cembre 2014 16:24:30 UTC+1, Emmanuel Charpentier a =C3=A9= >> crit : >>> >>> How do you reach your estimate of 16 Wh/Google search ? Any source ? >>> >>> In French: >> http://www.planetoscope.com/electronique/980-emissions-de-co2-par-les-reche= >> rches-sur-google.html >> 7g CO2/request. >> Google's own published estimates are much lower (0.2g/request), but I'm not= >>=20 >> sure we can trust them.=20 > > I think it would be fair to compare 16 Wh/Google search with the amount > of energy that a human consumes when searching in the library for one > hour, walking around carrying heavy books. I guess it would be similar to > "doing shopping", which is about 60 kcal per 15 minutes according to > http://laufleistung.net/kalorienverbrauch-berechnen/. Thus, it is 240 kcal > in one hour, which makes about 280 Wh. > > I don't know how much CO2 a human emmits in one hour.
This is discussed in the link I posted: http://googleblog.blogspot.com/2009/01/powering-google-search.html which claims "a Google search uses just about the same amount of energy that your body burns in ten seconds." > > Best regards, > Simon > > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-devel+unsubscr...@googlegroups.com. > To post to this group, send email to sage-devel@googlegroups.com. > Visit this group at http://groups.google.com/group/sage-devel. > For more options, visit https://groups.google.com/d/optout. -- William Stein Professor of Mathematics University of Washington http://wstein.org -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
