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- From: srgxbhh@grace.cri.nz
- Newsgroups: sci.environment
- Subject: Re: The Real Challenge
- Message-ID: <1k1iraINNbm7@zephyr.grace.cri.nz>
- Date: 24 Jan 93 20:33:19 GMT
- References: <149180366@hpindda.cup.hp.com>,<JMC.93Jan23183507@SAIL.Stanford.EDU>
- Organization: Industrial Research Ltd., New Zealand.
- Lines: 55
- NNTP-Posting-Host: grv.grace.cri.nz
-
-
- John McCarthy wrote
- >It is conceivable that we shall have to substitute
- >for high quality wood, which is indeed being rapidly used up. More
- >likely, we will succeed in getting high quality wood from tree farms.
- >As long as there is plenty of grain, there is no problem with meat.
- >Should we need to devote the present grain land to producing food
- >directly consumed by humans, then we can use synthetic carbohydrates
- >and bacterial proteins to feed our cattle and chickens. As for fish,
- >note that a substantial fraction of the salmon sold is already farm
- >raised.
- >
- >As for the inspirational message, when the content is mistaken,
- >flowery rhetoric can't save the message.
-
-
- This response to the challenge is very disappointing. The student
- will _have_ to work hard this term. Three out of Ten. Perhaps the
- student should consider alternative courses?
-
- Item 1. High quality wood.
- - no definition of "high quality", no assessment of the economics
- of tree farms for high quality wood, no numbers on plantation
- size, location, yield. No indication of the actual quantity
- required..
-
- Item 2. Meat
- - Basic confusion. Meat comes from animals, grain comes from
- plants. They are not equivalent ( unless Triffids count :-) )
- - Grain is not a dietary substitute for meat. e.g. No Cholesterol
- and the fats and oils contain different fatty acids.
- Grain also has different amino acid profiles, vitamins, and
- minerals, consider the need for vegetarians to balance their
- diets.
- - Please identify the synthetic carbohydrates you intend to
- squander on animals, and also the economics of manufacturing
- these carbohydrates and name the feedstock for them.
- - Please identify the bacterial proteins you intend to squander
- on animals, and also the economics of manufacturing these
- proteins and name the feedstock for them.
- - I would suggest that grazing animals on genetically improved
- grasses in mild climates ( no indoor winters ) may be a more
- appropriate alternative, however you have not provided any
- numbers, so comparisons can not be made.
-
- Item 3. Fish
- - I believe high protein diets are used in salmon farms.
- The protein fed to salmon comes from either fish or
- meat, and it is only the higher value of the salmon that
- economically justifies the farming. Please provide your
- source of information that indicates that fish farming could
- replace any significant % of marine fishing.
-
-
- Bruce Hamilton SRGXBHH@grv.grace.cri.nz
-