David:
I think the C14 ratio is pretty good evidence, but I think that the
C14 change is actually a rather small one. Last week I was looking at
some data on how much CO2 the oceans have absorbed in the past 200
years. I was quite surprised to calculate the net effect as a 0.44 ppb
increase, again, a very small number over 200 years and billions of
metric tons of CO2. The estimates of the carbon effects of oil and
coal production should be a useful tool, I would think. Deforestation
is certainly a factor.
I have no doubt that human activity has increased CO2 in the
atmosphere. I still wonder what other mechanisms may be involved in
the overall scheme of things. I am a strong believer in energy
conservation and am all for improving the efficiency of and reducing
the pollution of our powerplants and motor vehicles. I think increased
hydroelectric and nuclear power are fantastic ideas. CO2 capture has
many applications I'm sure. Deforestation should cease immediately.
The evaluation of and remediation of the many polluted sites we have
here in the U.S. are my line of work, after all.
On Jan 18, 6:18 pm, "David B. Benson" <[EMAIL PROTECTED]> wrote:
> On Jan 17, 5:15 pm, okc chemist <[EMAIL PROTECTED]> wrote:
>
> > ... proven fact, when like you say, 100 more years of research are
> > required.
>
> NO! It has been known for over 100 years.
>
> > There is good evidence that the burning of fossil fuels
> > accounts for the additional CO2 in the atmosphere, ...
>
> Another line of evidence is the reports of economic activity
> put out by (nearly) all governments, taking pride in how much
> fossil carbon was extracted from the ground each year. Using
> these, the usual estimate is that humans have added about
> 500 billion tonnes of carbon to the active carbon cycle in the
> last 250 years.
>
> So multiple lines of evidence demonstrate that the
> additional carbon is anthropogenic in origin. Seems
> completely scientific to me...
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