The EPA has taken another step today towards regulating greenhouse gas emissions. The agency formally declared that heat-trapping gases like CO2 and five others were a threat to public health and welfare.
In order to regulate the gases under the Clean Air Act, the agency had to prove that the gases endangered the public. The EPA recently announced that it would require companies to start reporting their greenhouse gas emissions and now with today's declaration, regulation could be as little as 60 days away, when the comment period ends on this ruling.
The scientific analysis found that CO2, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons and sulfur hexafluoride were in high concentrations in the atmosphere and that they are very likely causing increased draught, heavy downpours and flooding, more intense heat waves and wildfires, rise in sea levels, more intense storms and harm to water resources, agriculture, wildlife and ecosystems.
Ecogeeks already know all of this, but having a government agency officially declaring these facts means the the U.S. can more effectively contribute to negotiations over a new international climate treaty. Congress is drafting climate and energy legislation that will most likely supersede any regulations that the EPA comes up with, but this is a great first step that shows that our government is at least making progress towards protecting the planet.
via NY Times

written by Andrew, April 18, 2009
Obviously that example is ad absurdum, and CO2 can't be viewed in anywhere near the same light...but your argument is a meaningless straw man dressing up as scientific knowledge. The fact of the matter is, CO2 does act as a greenhouse gas, and the current scientific consensus is that, yes, it is changing the climate. And that's a big deal.
written by Fred, April 18, 2009
Also you are evidently confused as to what a straw man fallacy is, so here's another reference for you: http://en.wikipedia.org/wiki/Straw_man. - So you'll recognize it the next time you try to use it at the same time you're accusing someone else of it.
By the way, the "consensus" on CO2 and global warming is a political consensus, not a scientific one, and that is falling apart even as we watch.
Since you feel so informed by your consensus though, please answer a few troubling scientific questions for me:
1 - AGW computer models all predict a large greenhouse gas hot spot over the equatorial belt - why is it not there?
2 - Ice core data for the last 150K years show that CO2 increases always *followed* warming by several centuries. So what's causing the warming this time?
3 - Satellite data consistently show that the earth has not warmed since 2001, even while CO2 has increased. Why can't the AGW models account for this fact?
Thanks for helping me to better understand your reasoning in the face of these significant anomalies.
written by MollyGrue, April 20, 2009
Human emissions come from petroleum. Petroleum comes from plants that died millions of years ago. In plants, the 12CO2 is at higher level than the 13CO2 (the most common one). It means that: if the 12CO2 in the atmosphere is increasing, the CO2 comes from burning petroleum. If the 12CO2 is not increasing, the CO2 comes from releases by the warmed oceans.
And guess what? The 12CO2 level IS increasing - this was never observed in previous increasing CO2 levels.
And let me remind you that, in the present moment, the increase of temperature followed the CO2 increse from a few years - we didnt saw any increase of temperature in the past centuries that could explain the present CO2 levels, which also is (timely speaking) out of the natural cycles that caused the ice ages.
Other thing: H2O may be the most common greenhouse gas, but CO2 remains the greenhouse gas that is the easiest to controll/stop emitting (CH4 is most greenhouse-efficient, but can you ask the cows to stop having gases? will you ask farmers to breed kangaroos instead of cows?).
written by Morgan, April 20, 2009
You also state as fact that petroleum is derived from plants. This is also religious 'accepted dogma'. Did you know that hydrocarbons are exceedingly common in space? There are entire planetary bodies formed from it. It is probable that the bulk of our petroleum is abiotic in orgin too. This is an inconvenient truth for the peak oil meme bearers.
I am not denying that warming is currently taking place, but it is intellectually dishonest to exchange science for carbon politics, which is what has happened. Why? - Because there is a lot of money to be made by governments and corporations in trading carbon credits. Carbon credit trading looks like the next big Ponzi scheme.
written by MollyGrue, April 20, 2009
Hypothesing that the petroleum comes from outer space is completely stupid, for "out of space" things that enter the atmosphere are mostly rocks. I dunno where you found your assesments, for during all the years I spent studying the greenhouse subject, under both points of views, I never read such thing, ever, in anyone of other scientists' publications. But I did found all the previous informations I gave here...
written by MollyGrue, April 20, 2009
Explanation: let be the isotopic ratio of atmospheric carbon. When entering a plant through photosynthesis, the isotopic ratio changes, for plants uses more 12C and less 13C compared to what is found in the atmosphere. As a result, plants -and all creatures feeding over plants- are enriched with 12C. So is petroleum. If petroleum was coming from outer space, it would have the same isotopic ratio that outer space, which also is the same isotopic ratio than atmosphere.
And still, if petroleum was coming from outer space, burning it would logically add to the terrestrial CO2 levels. Simply because the forest area, which would be fit for uptaking the additional CO2, is dicreasing every year thanks to anthropic activities, releasing again more CO2 when burning.
And please, before stupidly saying that planetary bodies are entirely made out of hydrocarbons, question the atrophysic department of your university.
And before saying that carbon credits are currently being bought and sold, search out and find the real answer to your questions.
written by Musson, April 20, 2009
The increase in CO2 in China and India in the next 20years is the equivalent of all the CO2 produced in the USA and Canada.
written by Musson, April 20, 2009
Making statements like this show you have absolutely no understanding of statistical analysis. Anything you say is suspect.
If you had said there appears to be a correlation - I could accept that. But, your statement is ludicrous.
written by MollyGrue, April 21, 2009
And yes, the CO2 level, during the ice ages and inter-ice ages, came AFTER the warming, simply because warming, in these times, was due to astronomic cycles in the degree of inclination of the rotation axis of the Earth. Warmed, the oceans released CO2. But also, too much CO2 in the atmosphere -as there is nowaday- DOES cause warming.
If you look at the wavelenght of the light that comes out of the Earth (after absorption-emission of the solar heat) you see that there is a "window" of wavelenght through which Earth heat can go out of the atmosphere (the other wavelenghts are blocked by greenhouse gases) The problem is that CO2 affects this "window", blocking the exit of infrared light (the "heat" light if you prefer) That is why increasing atmospheric CO2 is increasing global atmospheric heat. The more CO2 you put in the atmosphere, the more you "close the window". By now, the window is "closed" far beyond all historic records (both in ice cores and carbonate deposits)
Meaning of all that: the more you "close the window", the more you heat the planet and the oceans, and the more CO2 will be released by the oceans. Oceanic acidification resulting to the perturbation of chemical equilibrium in carbonate chemical species is making living species disapper (such as coral reefs...)
Conclusion: past correlations between global heat and global CO2 level shows that the actual situation is worse that we thought.
written by Fred, April 21, 2009
Agreed that the greenhouse effect is real ; but CO2 only soaks up it's favorite wavelengths of light, and it's already very near its saturation point.
For example, imagine adding one more layer of insulation to an already well insulated house - it will only make a tiny difference in heat loss.
The same situation exists now with CO2 in the air. So any effects of additional CO2 will be extremely minor. Water vapor dominates the infra-red spectrum, and it can both heat and cool, something the AGW models fail to account for.
written by MollyGrue, April 22, 2009
Facts are needed to be known to understand why modelling in this case is very complicated and approximative: there is a latency time between the cause and the consequences, plus a thresehold effect. These still cannot be modelised until they happen -and when they happen, it means it is too late.
Greenhouse effect is not the only problem caused by too much CO2: ocean acidification is another one. And "global warming" is a litle bit inappropriate: even if, as a mean, temperature is raising, the main consequences are climate changes (which can be expressed as cooling in some regions, and too much/less rain in others).
The argument about water vapour is stupid for me; right, water vapour is responsible of the main part of the warming. Without it, no life would be possible on Earth. Still, because of the thresehold effect, litle changes in the atmospheric equilibrium has no catastrophic consequence YET. Once the thresehold is crossed, NO TURNING BACK is possible and consequences happen. Because of latency time, consequences are seen after the thresehold has been crossed.
Guys from the ecology department in the neighbour building studied this thresehold effect in some ecosystems (with a temperature or a chemical change) and guys from the Earth dynamism department next door keep on trying to modelise it for the atmosphere. I asked them this morning and they still lack data to built their models on. The problem is, to have these data, they need to see the consequences of crossing the CO2 thresehold...
written by Ekaterina, April 24, 2009
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Also CO2 levels in the atmosphere are essentially at a 500 million year LOW point. And yet you declare you already knew it was "too high". And you're glad some government bureaucrat makes it "official".
What rubbish.
But don't believe me! Just look at the Phanerozoic chart on Wikipedia.
Water vapor has a vastly greater greenhouse gas effect than CO2.
CO2 in the air is NOT at historically high levels, it is NOT a pollutant, and it is NOT a problem we need to solve.