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It would depend on the person's size and how active they are. Find the CO2 rates for an hour during sleep and being awake, multiply them by whatever you need and you'll figure out an annual estimate. However, a rough estimate (curtesy of "The Earth Blog") assuming 12 breaths per minute (resting breath rate) is 500kg

The number is easy to estimate: breaths per minute x CO2 per breath x minutes per year

From Wiki - the breath rate is 12 to 25 per minute. Size of breath is 500 mL. Percent CO2 exhaled is 4% so CO2 per breath is approx 0.04g ( 2g/L x .04 x .5l).

CO2 Per year= 12 x 0.04 x 525600 (minutes per year) = 252kg/yr

CO2 (25 breaths) = 525 Kg/yr.

So - pick a number between 252 Kg/yr and 525Kg/yr

1000 lbs/year is a good figure of merit.

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โˆ™ 2008-12-01 06:59:37
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Q: How much CO2 is exhaled by the average human each year?
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