Guest October 18, 2019 1 minute ago, Ward Smith said: Whale oil lamps were utterly destroyed Good Quote Share this post Link to post Share on other sites
footeab@yahoo.com + 2,129 October 18, 2019 (edited) 18 hours ago, Marcin said: Thank you for information. I found article stating that average CO2 in greenhouse to increase crops growth is 1000-1200 ppm. And in house heated by furnace up to 1000 ppm CO2 no problem, 1000-2000 ppm it is good to regulate furnace, over 2000 ppm there could be some harmful effects. So climate change problem solved, at least for next 100-150 years. Average building has 600ppm CO2 if not higher. Rule of thumb is approx 300ppm higher than ambient outside conditions. 1000ppm inside a building is quite normal. Submarines, navy ships? Higher yet. Edit: Basements etc? Well over 1000ppm EDIT: Did a VERY very dirty quick search and clicked this: https://www.aivc.org/resource/carbon-dioxide-levels-and-dynamics-elementary-schools-results-tesias-study Edited October 18, 2019 by footeab@yahoo.com Quote Share this post Link to post Share on other sites
Ward Smith + 6,615 October 18, 2019 Quote Wilson and Schaefer (1979) found that on Polaris submarine patrols that had measured CO2 concentrations between 7,000 and 12,000 ppm Quote Share this post Link to post Share on other sites
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