Other processes which may qualify : Fire clearance of Australia to desert grassland 40k Clearance of European forest for agriculture 2k Extinction of herbivore megafauna in Eurasia 6+k Also more localised, but combined, drainage of Saltmarsh for farmland
A On Jul 9, 2013 5:47 PM, "David Lewis" <[email protected]> wrote: > If inventing a way to convert nitrogen from air into chemicals qualifies > as geoengineering, it isn't even close to being the first example. I.e. > when the first hominid moved the first rock out of the way to get into the > first cave, according to Morton's reasoning, geoengineering began. See: > Wilkinson B. H. *Geology 33, 161 - 164 (2005)* *Humans as geologic > agents: A deep-time perspective.* > > From the abstract: "Humans are now an order of magnitude more important > at moving sediment than the sum of all other natural processes operating on > the surface of the planet". > > On Tuesday, July 9, 2013 4:16:29 AM UTC-7, geoengineeringourclimate wrote: >> >> Dear colleagues, >> >> Oli Morton of The Economist has penned an Opinion Article for the >> 'Geoengineering Our Climate?' series titled "Nitrogen Geoengineering" >> >> >> -- > You received this message because you are subscribed to the Google Groups > "geoengineering" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/geoengineering. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/groups/opt_out.
