"Fran" wrote in message
news:1187159426.707842.70130@q3g2000prf.googlegroups.com...
> On Aug 15, 4:16 pm, "Bonzo" wrote:
> > "Trevor Wilson" wrote in message
> > news:46c27f69$0$8096$88260bb3@free.teranews.com...
> > > Bonzo wrote:
> > > > Thursday, August 9, 2007
> > > > Want to Limit Your Carbon Output? Then Become a Couch Potato
> > > >http://global-warming.accuweather.com/
> >
> > > > We found this interesting article from the TimesOnline titled "Walking
to
> > the
> > > > shops 'damages planet more than going by car'.
> >
> > > > In the article, Chris Goodall, a Green Party candidate and author of How
to
> > Live
> > > > a Low-Carbon Life does a summary based on the greenhouse gases created
by
> > > > intensive beef production. He believes that a person will emit more
carbon
> > by
> > > > walking to the store compared to driving, and that there would also be
less
> > > > carbon emitted if people avoided exercise, ate less and became couch
> > potatoes.
> >
> > > > Here is a quote from Goodall, "The troubling fact is that taking a lot
of
> > > > exercise and then eating a bit more food is not good for the global
> > atmosphere.
> > > > Eating less and driving to save energy would be better."
> >
> > > **Really? Let's do some math, shall we?
> > > My car is equipped with a very accurate fuel metering system. I know
> > > EXACTLY how much fuel is used travelling to the shops. It is:
> > > 0.19Litres for the trip down to the shops and:
> > > 0.2Litres for the return trip. Warm engine, but a long hill climb back.
> > > That is 0.39 Litres of ULP. Significantly more energy than when walking
> > > or riding a bicycle.
> > > When I ride my bicycle, it takes around 15 minutes (return). I know that
> > > I generate around 100 Watts whilst riding my bike (I know this, because
> > > I have previously measured my ability on a stationary bike). Allowing
> > > for uphill and downhill rides, let's average that to 75 Watts (very
> > > generous, since it would be more like 50 watts. For a 15 minute trip,
> > > that is 18.75 W/hrs of power. Or 67.5kj.
> > > My favourite lunchtime meal consists of a Baker's Delight Cape Seed
> > > Roll, with tuna and salad. The roll, ALONE, provides a whopping 1,5010kJ
> > > of energy. More than enough to get me to the shops and back. Many times.
> > > The tuna even more. The salad provides neglible energy.
> >
> > Yes, really! He is referring to CO2 emissions.
> >
> > Yes but how does emission of the alarmists current "gas de jour", viz: CO2,
> > compare?
> > I bet more CO2 is emitted by walking than by driving.
> You bet???? You mean you have no actual studies? Just a guess??
> Frankly, I don't back your guessing power.
> You know, "Bonzo", before you could work out a comparison, you'd first
> have to have .... [drum roll ...] a *model*.
-
Don't forget the disclaimers when you start talking about crap models Fran!
Here, let me rectify the situation...
Disclaimer
The projections are based on results from computer models that involve
simplifications of real physical processes that are not fully understood.
Accordingly, no responsibility will be accepted by CSIRO for the accuracy of
the projections inferred from this brochure or for any person's
interpretations, deductions, conclusions or actions in reliance on this
information.
And further:
Climate model responses are most uncertain in how they represent feedback
effects, particularly those dealing with changes to cloud regimes,
biological effects and ocean-atmosphere interactions. The coarse spatial
resolution of climate models also remains a limitation on their ability to
simulate the details of regional climate change. Future climate change will
also be influenced by other, largely unpredictable, factors such as changes
in solar radiation, volcanic eruptions and chaotic variations within the
climate system itself. Rapid climate change, or a step-like climate response
to the enhanced greenhouse effect, is possible but its likelihood cannot be
defined. Because changes outside the ranges given here cannot be ruled out,
these projections should be considered with caution.
-
Regards
Bonzo
"To defeat relativity one did not need the word of 100 scientists, just one
fact." Albert Einstein
|