I might mention that when Co2 hits 10,000 ppmbv, all complex animal is dead. It literally suffocates when Co2 is 1% of the atmosphere. Mind you breathing is already very difficult when Co2 gets to 0.5%.
The next trick of our glorious banks will be to charge us a fee for using net bank!!! You are no longer customer, you are property!!!
I might mention that when Co2 hits 10,000 ppmbv, all complex animal is dead. It literally suffocates when Co2 is 1% of the atmosphere. Mind you breathing is already very difficult when Co2 gets to 0.5%.
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.[61]
Prolonged exposure to moderate[clarification needed] concentrations can cause acidosis and adverse effects on calcium phosphorus metabolism resulting in increased calcium deposits in soft tissue. Carbon dioxide is toxic to the heart and causes diminished contractile force.[60]
Toxicity and its effects increase with the concentration of CO2, here given in volume percent of CO2 in the air:
1% can cause drowsiness with prolonged exposure.[7] At 2% it is mildly narcotic and causes increased blood pressure and pulse rate, and causes reduced hearing.[60] At about 5% it causes stimulation of the respiratory center, dizziness, confusion and difficulty in breathing accompanied by headache and shortness of breath.[60] Panic attacks may also occur at this concentration.[62][63] At about 8% it causes headache, sweating, dim vision, tremor and loss of consciousness after exposure for between five and ten minutes.[60]
Due to the health risks associated with carbon dioxide exposure, the U.S. Occupational Safety and Health Administration says that average exposure for healthy adults during an eight-hour work day should not exceed 5,000 ppm (0.5%). The maximum safe level for infants, children, the elderly and individuals with cardio-pulmonary health issues is significantly less. For short-term (under ten minutes) exposure, the U.S. National Institute for Occupational Safety and Health (NIOSH) and American Conference of Government Industrial Hygienists (ACGIH) limit is 30,000 ppm (3%). NIOSH also states that carbon dioxide concentrations exceeding 4% are immediately dangerous to life and health[64] although physiological experiments show that such levels can be tolerated for some time.[65]
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.[65][66] However, it should be noted that submarines have carbon dioxide scrubbers which reduce a significant amount of the CO2 present.[67]
These figures are valid for pure carbon dioxide. In indoor spaces occupied by people the carbon dioxide concentration will reach higher levels than in pure outdoor air. Concentrations higher than 1,000 ppm will cause discomfort in more than 20% of occupants, and the discomfort will increase with increasing CO2 concentration. The discomfort will be caused by various gases coming from human respiration and perspiration, and not by CO2 itself. At 2,000 ppm the majority of occupants will feel a significant degree of discomfort, and many will develop nausea and headaches. The CO2 concentration between 300 and 2,500 ppm is used as an indicator of indoor air quality.
The next trick of our glorious banks will be to charge us a fee for using net bank!!! You are no longer customer, you are property!!!
So you're claiming 10,000ppmbv is fatal and currently there is 390 ppmbv MAXIMUM in the atmosphere, which means it will need to raise by a factor of 25x before it becomes deadly
Yet, in the article you site, it seems there need to be a minimum of 8% total volume before any terminal ill effects are felt., which is 80,000ppmbv, some 8x above your recommended fatal dose?
As for your claim that CO2 can't be expelled from the human body, what do you think is expelled when we breathe out?
So you're claiming 10,000ppmbv is fatal and currently there is 390 ppmbv MAXIMUM in the atmosphere, which means it will need to raise by a factor of 25x before it becomes deadly
Yep, that's 25x.......just give industrialization enough time I'd say we'll be there before 2500 AD.
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Yet, in the article you site, it seems there need to be a minimum of 8% total volume before any terminal ill effects are felt., which is 80,000ppmbv, some 8x above your recommended fatal dose?
How's your reading comprehension? That's on a temporary basis, try being born, growing and living at a constant 10,000 ppmbv suffering from constant acidosis.
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As for your claim that CO2 can't be expelled from the human body, what do you think is expelled when we breathe out?
If the air you breath in has high amounts of Co2, yes it is harder for your body to lose it.
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Get your story straight :rolleyes:
The story is straight, it's your eyes that are bent.
The next trick of our glorious banks will be to charge us a fee for using net bank!!! You are no longer customer, you are property!!!
Having met JH he certainly stuck me as a very savvy and opinionated man. His grasp of science was weak, but he did point out that as a politician that was not an important requirement. From memory, I think he said "I have scientists to advise me of that kind of thing".
FORMER Prime Minister John Howard has launched a controversial book teaching students to be climate change sceptics.
Climate change sceptic Ian Plimer's book "How to Get Expelled from School: A Guide to Climate Change for Pupils, Parents and Punters" arms children with 101 questions to challenge their teachers.
It has been billed as an "anti-warmist manual for the younger reader".
Mr Howard attacked the one-sided teaching of climate change in schools.
"People ought to be worried about what their children are being taught at school," he said.
"It's a matter of real concern".
Prof Plimer said said he had a lot of parents write to him about this topic.
"They were saying that their kids are being fed environmental activism at school, rather than the basics of science, which gives them the ability to analyse activist arguments," he said.
The 250-page book includes a list of questions intended to embarrass poorly prepared teachers.
An irrelevant, dinosaur of a politician that lost his own seat as PM is endorsing a book about climate change by someone who is a mining geologist (and director of 4 mining companies).
Having met JH he certainly stuck me as a very savvy and opinionated man. His grasp of science was weak, but he did point out that as a politician that was not an important requirement. From memory, I think he said "I have scientists to advise me of that kind of thing".
If you don't believe in Global Warming and the Greenhouse effect. Then surely you don't believe the Greenhouse effect already warms the average surface by 33 C in the first place. The average earth surface temperature would be -19 C if there wasn't already a Greenhouse effect.
The deniar argument is simple. GW doesn't exist.......if it does exist then human industrial activity has no part in it. The deniars don't even have a consistent argument.
The next trick of our glorious banks will be to charge us a fee for using net bank!!! You are no longer customer, you are property!!!
An irrelevant, dinosaur of a politician that lost his own seat as PM is endorsing a book about climate change by someone who is a mining geologist (and director of 4 mining companies).
Anyhow.... There's a good article on the The Punch about this book.
How Plimer’s climate change book might just work Climate change sceptics shouldn’t have to resort to juvenile ‘Gotcha’ tactics to get attention. But Professor Ian Plimer just did. And his target? Schoolteachers. Nice.
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