Quoted message said:Tim Jackson said:On Thu, 09 Aug 2007 09:27:11 +0100, [email hidden] wrote...
Quoted message said:On Thu, 9 Aug 2007 01:22:44 +0100, Tim Jackson
<[email hidden]> wrote:
>Here's a further reason why it is bad science.
But what you have missed is the Chris Street expanded the argument
into food in general - see above.
The point you missed is that these are two entirely separate reasons why
it is bad science. They are not connected. Hint: I said "Here's a
**further** reason".
Nonsense. It's the reason it's not a reason.
No it was *a* reason. There are others.
Quoted message said:
Quoted message said:
Quoted message said:>So not even the author of this bad science supports Angus's view that
>it's better to drive than to walk.
So you're using the views of the author you condemn for "bad science"
to support your views.
No, he doesn't support my views, and I didn't say he did. I merely
pointed out that he doesn't support **your** view. Hint: I said "not
even the author of this bad science supports Angus's view".
You're confused. The author wasn't the bad scientist, he was the
writer of the article. The environmentalist did say it was better to
drive than walk in terms of CO2 emissions. "Walking does more than
driving to cause global warming, a leading environmentalist has
calculated."
Here is what was said.
based on the greenhouse gases created by intensive beef production.
´Driving a typical UK car for 3 miles [4.8km] adds about 0.9 kg [2lb] of
CO2 to the atmosphere,¡ he said, a calculation based on the Governmentÿs
official fuel emission figures. ´If you walked instead, it would use about
180 calories. Youÿd need about 100g of beef to replace those calories,
resulting in 3.6kg of emissions, or four times as much as driving.
Now here is why it is wrong.
The comparison is between the CO2 emissions for a car, and the CO2
emissions in the production of beef leading to the conclusion that a car
emits less CO2 than a walker. There are a deal of things wrong with this
approach.
Firstly the CO2 production of the walker is not considered. Increased
calory consumption results in increased respiration and CO2 emission.
The article compares the cost of producing the beef. Part of this beef
production cost is due to energy and therefore fossil fuel usage and CO2
emissions. It is fair to consider that. It does not consider the same type
of energy consumption involved in the extraction and transport of the
vehicle fuel.
It can be seen that there are two large and important types of emission
that are not considered. As such the article states figures that are not
representative of the true picture.
Furthermore it presumes that the walker will derive all his/her calories
from beef. Proteins are a poor source of energy for walking. Furthermore
animal protein production is the most inefficient means of food production
possible. Dare I suggest it was picked for that reason? Animals consume and
waste large amounts of plants to produce meat. Ditto dairy. (the other
comparison that was made - again suspicious). If you wanted to walk then a
carbohydrate such as cereals, pulses, etc would serve you better, be more
likely to be chosen and would require dramatically less CO2 in production
terms.
Quoted message said:
So when you said "So not even the author of this bad science supports
Angus's view that it's better to drive than to walk", you were getting
your mind in a knot
Quoted message said:Quoted message said:Typical :-))
It is indeed typical that you don't read what has been written. :-((
You may like to go back and have a look then. The comparison above has been
poorly chosen and gives a misleading result due to the erroneous
comparisons that were drawn.