"Dan Luke" wrote:
"Jim Logajan" wrote:
6. Human activity currently releases 6 billion tons of CO2 per
year.

The evidence is clear that something is wrong with the above
claims.


...and shouldn't that be 6GT of *carbon* each year? Has the
professor confused CO2 with carbon?

According to the U.S. EPA the claim seems to be in the right order of
magnitude, though is indicates the U.S. alone produces the equivalent
of ~6 billion tons of CO2 per year:

http://yosemite.epa.gov/oar/globalwarming.nsf/UniqueKeyLookup/RAMR6P5M5M/$File/06FastFacts.pdf

But according to the USGS, the total global human contribution of CO2
is 4 times that amount:

http://volcanoes.usgs.gov/Hazards/Wh...html#reference

No discrepancy, really, between ~6x10^9 tons/year for only the U.S. and
~22x10^9 tons/year worldwide.

It appears to me that the professor *has* confused carbon with CO2,
and his argument collapses, no?

There are many aspects of the copy-and-pasted material that are
disputable. I just posted elsewhere all the items that are in fact
arguable. The source of the errors is, to me at least, academic.