I maintain that development of techniques for fire clearance, and axes for
deforestation would fit your definition.

I doubt very much that aboriginal hunters in Australia or southern European
farmers lacked the intent to clear land, nor that they only used pre
existing technology. It was clearly done to remove constraints on food
supply.

It's deliberate, it's technological, it's large scale, and it's in response
to food supply constraints - so I believe it fits your definition.

A
On Jul 10, 2013 12:43 PM, "O Morton" <omeconom...@gmail.com> wrote:

> David (and also Andrew),-- if you look at "Morton's reasoning" as
> expressed in the text, you'll find that I don't agree.
>
> The technology required for the industrial takeover of the nitrogen cycle
> did not appear through an unguided process of innovation, nor was it
> deployed that way; the foresight involved is part of what makes it a
> geoengineering technology in a way that other agricultural innovations, and
> indeed agriculture itself, are not. Nitrogen fixation was developed
> purposefully in response to a threat, which, while not obvious in everyday
> life, had been identified by the scientific elite. Like climate change
> today, that threat was seen as being of global significance and to have no
> easily attainable political solution. That justified a concerted effort to
> develop a technological response. Though people working in the climate
> arena may not immediately recognize this response as geoengineering, some
> of those working on the nitrogen cycle have no problem seeing it as such.
>
> On Tuesday, 9 July 2013 16:47:30 UTC+1, David Lewis 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"
>>>
>>>
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