See this article: Sun Warms and Cools the Earth where it says:
And here's what the Cs said in April, 2007:
"To fit these data into a global carbon cycle IPCC assumed a
speculative lifetime for man-made CO2 in the atmosphere as 50 to 200
years, ignoring observational evidence from 37 studies (based on
natural and nuclear bomb carbon-14, Suess effect, radon-222,
solubility data and carbon-13/carbon-12 mass balance) documenting that
the real lifetime is about 5 years [4]. With CO2 atmospheric lifetime
of about 5 years the maximum amount of man-made CO2 remaining now in
the atmosphere is only 4%, and not 36% (see review in (Segalstad,
1998) . "
And here's what the Cs said in April, 2007:
Cs said:Q: What percentage of what we’re seeing today as global warming is
coming from manmade compared to cosmic?
A: 4 percent.
Q: (J) There ya go. So let’s buy a hummer. (laughter) (H) And are the people that are selling us the global warming…a re
they aware that this is all….. all fake?
A: Some.