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| WHY CARES ABOUT CO2 CONCENTRATION? |
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Global warning potential (GWP) is a relative measure of how much heat a greenhouse gas traps in the atmosphere. It compares the amount of heat trapped by a certain mass of the gas in question to the amount heat trapped by a similar mass of carbon dioxide(CO2). |
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Carbone dioxide emissions therefore are the most important cause of global warming. CO2 is inevitably created by burning fuels like e.g. oil, nature gas, diesel, organic-diesel, petrol, organic petrol, ethanol. The emissions of CO2 have been dramatically increased within the last 50 years and are still increasing by almost 3% each year. |
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| GUIDELINES AND EXPOSURE LIMIT REFERENCE: |
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Taiwan EPA (Environmental Protection Administration) |
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Type I: Indoor areas such as department stores, theaters, restaurants, libraries, the acceptable CO2 level of 8 hours is 1000ppm |
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Type II: Indoor areas with special requirement of good air quality such as schools, hospitals, day care centers, the suggested CO2 level is 600ppm |
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ASHRE standards 62-1999: In occupied building should not exceed 1000ppm |
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Building bulletin 101(Bb101): |
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UK standards for schools: Average over the whole day (i.e. 9am to 15:30) should not exceed 1500ppm |
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OSHA USA: |
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Time weight average over five 8-hours work days should not exceed 5000ppm |
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Germany,Japan,Australia,.. |
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8 hours weighted average in occupational exposure limit is 5000ppm |
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