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> O2 is part of the water vapor. You wouldn't want pure O2 in the atmosphere. But I am sure you knew that. Water vapor is a compilation of molecules.

No. O2 is not part of water vapor. I don't have time to correct all of your science errors, but it doesn't help to have people on the correct side of an argument garbling facts and making us look stupid. Look up "Niven's Law".

Essentially, you mis-claimed "water vapor is 98% of the greenhouse gas present in Earth's lower atmosphere" and instead claimed that "water vapor is 98% of earth's atmosphere". It was an easy mistake to make, and could be excused as a typo. Please stop compounding your mistake by claiming it is correct.

http://www.clearlight.com/~mhieb/WVFossils/greenhouse_data.html

Mr170IQ,

95%, excuse me. Please see the link attached and tell me how I am mistaken. This website has been my old faithful for explaining the global myth of man made global warming. Are they wrong?

I'll be less vocal in the future with my ignorance.

Water Vapor Rules
the Greenhouse System

Just how much of the "Greenhouse Effect" is caused by human activity?

It is about 0.28%, if water vapor is taken into account-- about 5.53%, if not.

This point is so crucial to the debate over global warming that how water vapor is or isn't factored into an analysis of Earth's greenhouse gases makes the difference between describing a significant human contribution to the greenhouse effect, or a negligible one.

Water vapor constitutes Earth's most significant greenhouse gas, accounting for about 95% of Earth's greenhouse effect (4). Interestingly, many "facts and figures' regarding global warming completely ignore the powerful effects of water vapor in the greenhouse system, carelessly (perhaps, deliberately) overstating human impacts as much as 20-fold.

Water vapor is 99.999% of natural origin. Other atmospheric greenhouse gases, carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and miscellaneous other gases (CFC's, etc.), are also mostly of natural origin (except for the latter, which is mostly anthropogenic).

Human activites contribute slightly to greenhouse gas concentrations through farming, manufacturing, power generation, and transportation. However, these emissions are so dwarfed in comparison to emissions from natural sources we can do nothing about, that even the most costly efforts to limit human emissions would have a very small-- perhaps undetectable-- effect on global climate.

For those interested in more details a series of data sets and charts have been assembled below in a 5-step statistical synopsis.

Note that the first two steps ignore water vapor.