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#1326 | |
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http://en.wikipedia.org/wiki/Carbon_...man_physiology Here's the relavant bit ToxicitySee also: Carbon dioxide poisoning Main symptoms of carbon dioxide toxicity, by increasing volume percent in air.[8]Carbon dioxide content in fresh air (averaged between sea-level and 10 kPa level, i.e., about 30 km altitude) varies between 0.036% (360 ppm) and 0.039% (390 ppm), depending on the location.[76] Adaptation to increased levels of CO2 occurs in humans. Continuous inhalation of CO2 can be tolerated at three percent inspired concentrations for at least one month and four percent inspired concentrations for over a week. It was suggested that 2.0 percent inspired concentrations could be used for closed air spaces (e.g. a submarine) since the adaptation is physiological and reversible. Decrement in performance or in normal physical activity does not happen at this level.[77][78] However, it should be noted that submarines have carbon dioxide scrubbers which reduce a significant amount of the CO2 present.[79] Acute carbon dioxide physiological effect is hypercapnia or aphyxiation sometimes known by the names given to it by miners: blackdamp (also called choke damp or stythe). Blackdamp is primarily nitrogen and carbon dioxide and kills via suffocation (having displaced oxygen). Miners would try to alert themselves to dangerous levels of blackdamp and other gasses in a mine shaft by bringing a caged canary with them as they worked. The canary is more sensitive to environmental gasses than humans and as it became unconscious would stop singing and fall off its perch. The Davy lamp could also detect high levels of blackdamp (which collect near the floor) by burning less brightly, while methane, another suffocating gas and explosion risk would make the lamp burn more brightly). Carbon dioxide differential above outdoor levels at steady state conditions (when the occupancy and ventilation system operation are sufficiently long that CO2 concentration has stabilized) are sometimes used to estimate ventilation rates per person. CO2 is considered to be a surrogate for human bio-effluents and may correlate with other indoor pollutants. Higher CO2 concentrations are associated with occupant health, comfort and performance degradation. ASHRAE Standard 62.1–2007 ventilation rates may result in indoor levels up to 2,100 ppm above ambient outdoor conditions. Thus if the outdoor ambient is 400 ppm, indoor levels may reach 2,500 ppm with ventilation rates that meet this industry consensus standard. Levels in poorly ventilated spaces can be found even higher than this (range of 3,000 or 4,000). Then there's this. http://archive.rubicon-foundation.or...123456789/3861 Adaptation to moderate inspired concentrations of carbon dioxide (to three and four percent) occurs in normal men who can tolerate continuous inhalation of three percent inspired CO2 for at least one month and four percent inspired CO2 for over a week. Because the effects produced by low and moderate concentrations of carbon dioxide are physiological and reversible, rather than toxic and damaging, it is recommended that the allowable inspired levels of carbon dioxide be increased from 0.5 to 2.0 percent in inspired air. This level has not been shown too induce decrement in performance or in normal physical activity. |
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#1327 | |
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I think the lack of understanding of what Eel posted is yours:
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Nothing you posted tells us what era Eel was referring to. |
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#1328 |
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BC, are you and Eel thinking that the concern over atmospheric CO2 is over safe levels for humans breathing it and surviving? I found the Wikipedia page yesterday and noted the ~2% level being tolerable for a time so that must be a weight off your mind.
More to the (AGW) point though, at much lower levels (currently 350-400ppm) it's making the world hotter. We know it's not linear but we have to get off our collective backsides and do something well before we let it reach whole-number percentages. |
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#1329 | ||||||
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But if >560ppmv makes the planet unlivable, shouldn't I be thinking of installing CO2 mitigation devices. Probably a huuge market for those, especially in the US where CO2 has been designated a toxic pollutant. In fact, why not make them mandatory everywhere, especially given the amount of toxic CO2 humans exhale. We're about to hold the Olympics, let's show the world how green we are and fit all the athletes with CCS masks! |
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#1330 | |||
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Poor air quality has been known to be harmful. Humans share a lot of similarity to sea water. If sea water can be turned into acid at <560ppmv, just think what 2,000+ must be doing to your bodies! Read this for more info- http://en.wikipedia.org/wiki/Respiratory_acidosis then of course there'll be the potential respiratory effects of black molds that may make the situation worse.. Quote:
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#1331 | ||||
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Zombie?
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Think of it as a variation on Gore et Al's bottle experiment from his 24hrs of madness. Just without the fakery. 2 bottles, 1 with CO2, 1 without. Heat source, warming in a bottle. Proof of GHG and impending Thermageddon, as described by the unScientific American if we exceed 560ppmv. You've been in a similar experiment. Heat source, CO2 emissions and to make it more fun, you've also been emitting that positive feedback amplifier.. Water vapor. How come you ain't dead? Quote:
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Difference is we consumed less, so had smaller bills thanks to global warming, climate change or just the weather.. |
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#1332 | |||||
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And a drop in prices, even if higher than the same time last year, will result in a lower rate of inflation, a lower rise in other words. |
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#1333 | |
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Such as? Air conditioning or CCS in your bedroom to keep CO2 levels below 560ppmv?
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February's leccy bill would have been KWh x the unit price. February's bill could be lower if either the number of KWh used or the unit price were lower.. For a milder February, especially compared to last year, which do you think is the more likely reason for a lower energy bill? For bonus points, compare mortality rates for the same month.. Another reason why global warming is good.. |
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#1334 | |||||
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#1335 | ||
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[quote=Jellied Eel;57263512]
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#1336 |
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CO2 and GHG's avert Thermageddon!
http://wattsupwiththat.com/2012/03/2...he-atmosphere/
Solar Storm Dumps Gigawatts into Earth’s Upper Atmosphere For the three day period, March 8th through 10th, the thermosphere absorbed 26 billion kWh of energy. Infrared radiation from CO2 and NO, the two most efficient coolants in the thermosphere, re-radiated 95% of that total back into space. Cue the usual suspects to deny CO2 as a cooling gas.. |
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#1337 |
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Actually we keep pointing it out as the reason why climate models are inherently unreliable. Climate modellers know this. The politically motivated deny it and demand billions.
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#1338 | |
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This "usual suspect" is simply going to point out that the thermosphere is not "the atmosphere". The thermosphere is so high up and so sparcely populated with molecules that the International Space Station orbits slap bang in the middle of it.
One again, the hopeless jumble of misunderstand science factoids randomly jostling for attention in your brain lets you down. It's the same reason you regularly trot out nonsense like: "Humans lived through 560ppm and that's without the technological assistance we have today." ...and then struggle to justify it as some sort of bedroom humour, without ever managing to explain what "technological assistance" we have today. Quote:
People who don't know any science but are ideologically driven to dispute its findings - people just like you - inevitably find that inconvenient. |
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#1339 | ||
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#1340 | |
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What does concern me is the attitude of people like you have towards CO2 and your insistance on spending vast quantities of moenel, not to mention wrecking economies, to solve a none problem. |
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#1341 | |
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We do after all routinely live in CO2 levels above 560ppm without any technical assistance. |
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#1342 |
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#1343 | |
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Eel clearly isn't talking about today, because he says: "Humans lived through 560ppm and that's without the technological assistance we have today" And of course nobody apart from you (and now possibly Eel, in an attempt to avoid further embarrassment) was talking about breathable levels of CO2. Everybody else was talking about the well-mixed level of CO2 in the atmosphere, and its effect on the climate, which is something quite different. |
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#1344 | |
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![]() Now, in the best traditions of Blue Peter, here's some science you denied earlier. http://en.wikipedia.org/wiki/File:Co...ature-plot.svg http://www.geocraft.com/WVFossils/last_400k_yrs.html |
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#1345 |
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Yes, but you claimed to have calculated cooling since 2002 with a statistical significance of just under 60% so we know how reliable your assertions are.
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#1346 | |
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ho for some real honest science for a change. |
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#1347 | |
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Again. But you won't let everything you say being wrong put any doubt in your mind that you might actually be wrong, will you? Have you even understood what statistical significance means yet? The last time you tried to explain it you were even more wrong than you usually are. |
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#1348 | |
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even this AGW graph shows the global temperature is probably cyclic in nature. http://www.bbc.co.uk/blogs/paulhudso...emperatu.shtml and HadCRUT shows shows strong, steady cooling over the last 10 years. http://www.real-science.com/phil-ends-time-in-2010 but hay dont let reallity get in the way of a good story. |
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#1349 | |
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All you're looking at is this: http://www.skepticalscience.com/pics/Skeptics10.gif Edit: And look how much warmer the cycle you posted is than the previous cycle. That's what "underlying" means and is why scientists smooth data. |
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#1350 | |
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but using another well trusted temperature guage used by climate scientists TREE RINGS say the world is cooling. ![]() ![]() ![]()
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