[Sherman Logan]

2) Man-made carbon dioxide emissions throughout human history constitute less than 0.00022 percent of the total naturally emitted from the mantle of the earth during geological history.

This is comprehensively irrelevant.

The concentrations of CO2 are indeed rising significantly as a result of human activity. This is an unchallengeable scientific fact.

There is lots of room for debate about how, if at all, this will affect the earth's climate, but the fact itself is not in question.

[WOBBLY BOB]

I look forward to a longer growing season in the Midwest so we can feed all those bitching 3rd world countries.

[nobdysfool]

The concentrations of CO2 are indeed rising significantly as a result of human activity. This is an unchallengeable scientific fact.

And your proof for this would be.....?

Tell us what the percentage content of our atmosphere is which is carbon dioxide. It is minuscule.

Define "significantly". That word has no real meaning outside of a framework of definition vis a vis the subject.

I suggest you define, and offer proof instead of just posting the AGW or ACC talking points.

[nobdysfool]

I'll go ahead and answer my own question:

Only about 0.03 percent of the Earth's atmosphere consists of carbon dioxide (nitrogen, oxygen, and argon constitute about 78 percent, 20 percent, and 0.93 percent of the atmosphere, respectively).

How much of that is from human activity?

Most of the carbon dioxide in the atmosphere does not come from the burning of fossil fuels. Only about 14 percent of it does.

OK, let's look at the numbers. 0.03% is 3 one-hundreths of one percent. Now, what is 14% of that? 0.0042%. That's 4.2 thousandths, or 42 ten-thousandths of one percent, which is, as I said, minuscule.

For perspective, the volume of the earth's atmosphere is estimated to be a little over 17 and a quarter trillion cubic kilometers.

H2O (water vapor) is a much more prevalent greenhouse gas, at about 1% to 4% of the atmosphere at the surface, on average. Nearly all life on earth is carbon based, and yet we are being told that a form of carbon which we all exhale every day, is a pollutant. One doesn't need a science degree, just a little common sense to see right through this blatant grab for power and control by politicians of every stripe.

[Mr. Silverback]

Even if we take the measurements the warmers use (and the objections to that downthread have validity) then that means that we have, in 200 years, raised the CO2 level by .000110 of the atmosphere's composition. And in fact, even though the measurements currently being touted by lefties (like the folks at CO2 Now) are from a site on the side of a bleedin' active volcano, they still show carbon concentrations that are LOWER than in 1987.

In other words, before the Industrial Revolution, carbon in the atmosphere was 2.9% as common as Argon, and now it's 4.1% as common as Argon. Whoop-dee-doodly-doo.

[MrB]

TOTAL human contribution to the greenhouse effect is 0.28%
The CO2 portion of human contribution to the GE is 0.117%

http://www.geocraft.com/WVFossils/greenhouse_data.html

[UCANSEE2]

There is lots of room for debate about how, if at all, this will affect the earth's climate, but the fact itself is not in question.

In science class if you heat a gas, it expands.

You can cause a gas to create a change in temperature, but you must do so by changing the pressure.

Now, if GW scientists can change the 'pressure' of the atmosphere, I'm willing to send them money.