Innocent bystander wrote on Oct 2^nd, 2013 at 9:12pm:


Yes the world when CO2 levels hovered around 10,000 ppmv (~1% v/v)

Innocent bystander wrote on Oct 2^nd, 2013 at 9:30pm:


....and we all know what happens to innocent bystanders don't we innocent bystander?

Innocent bystander wrote on Oct 2^nd, 2013 at 9:54pm:


give me a good reason to respond to your cultist denialist religious dogma and I may consider responding to your residual excremental public comments

Now be gone with you putrid freak clown of Hades

muso seems to have an innocent bystander up against the ropes

see what happens when you read too much Bolt with your breakfast?

What are the Allowable Limits of CO2 EXPOSURE

Carbon dioxide exposure limits PEL and TLV set by OSHA and NIOSH

Carbon dioxide is regulated for diverse purposes but not as a toxic substance.

bullet      The U.S. EPA CO2 exposure limits: The U.S. EPA recommends a maximum concentration of Carbon dioxide CO2 of 1000 ppm (0.1%) for continuous exposure.
bullet      ASHRAE standard 62-1989 recommends an indoor air ventilation standard of 20 cfm per person of outdoor air or a CO2 level which is below 1000ppm.
bullet      NIOSH CO2 exposure limits: NIOSH recommends a maximum concentration of carbon dioxide of 10,000 ppm or 1% (for the workplace, for a 10-hr work shift with a ceiling of 3.0% or 30,000 ppm for any 10-minute period). These are the highest threshold limit value (TLV) and permissible exposure limit (PEL) assigned to any material.  NIOSH's recommended CO2 exposure limit for 15 minutes is 3.0% or 30,000 ppm . A CO2 level of 4% (40,000 ppm)  is designated by NIOSH as immediately dangerous to life or health.
bullet      OSHA CO2 exposure limits: The U.S. Department of Labor Occupational Safety & Health Administration, OSHA, has set Permissible Exposure Limits for Carbon Dioxide in workplace atmospheres at...
bullet       10,000 ppm of CO2 measured as a Time Weighted Average (TWA) level of exposure
bullet      OSHA has set 30,000 ppm of CO2 as a Short-Term Exposure Limit (STEL).
bullet      OSHA has also set a Transitional Limit of 5,000 ppm CO2 exposure TWA.
bullet      [OSHA's former limit for carbon dioxide was 5000 ppm as an 8-hour TWA.]
bullet      OSHA recommends a lowest oxygen concentration of 19.5% in the work place for a full work-shift exposure. As we calculated above, for the indoor workplace oxygen level to reach 19.5% (down from its normal 20.9% oxygen level in outdoor air) by displacement of oxygen by CO2, that is, to reduce the oxygen level by about 6%, the CO2 or carbon dioxide level would have to increase to about 1.4% 14,000 ppm.
In summary, OSHA, NIOSH, and ACGIH occupational exposure standards are 0.5% CO2 (5,000 ppm) averaged over a 40 hour week, 3% (3,000 ppm) average for a short-term (15 minute) exposure [we discuss and define "short term exposure limits" STEL below], and 4% (40,000 ppm) as the maximum instantaneous limit considered immediately dangerous to life and health.

Innocent bystander wrote on Oct 3^rd, 2013 at 7:11am:


If anything, that confirms what I said before.

Narsty stuff that co2 


Rising atmospheric carbon dioxide levels are bolstering plant life throughout the world, environmental scientists report in a newly published peer-reviewed study. The findings, published in Geophysical Research Letters, are gleaned from satellite measurements of global plant life, and contradict assertions by activists that global warming is causing deserts to expand, along with devastating droughts.


http://www.forbes.com/sites/jamestaylor/2013/07/10/global-warming-no-satellites-...

Here is the original caption for that graph:
Quote:


So the maximum value on that line is 20 and the preindustrial CO2 is 300. 20 x 300 = 6000ppm.

Of course, it's immaterial that the ocean floor temperature was around 28 degrees C, compared to about 4 degrees today. There was no terrestrial life at that time. That's a famous Monckton blooper by the way.