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# How much carbon does the average human adult convert and breathe out as carbon dioxide in a day? How much carbon is trapped from the air again by the photosynthesis of the average fully green-leafed oak tree in a day?

Question #44598. Asked by gmackematix. (Feb 23 04 8:42 PM)

sequoianoir

The daily output of CO2 by the average human is around 1 kilogram.

One mature tree absorbs approximately 13 pounds of carbon dioxide a year. For every ton of wood a forest grows, it removes 1.47 tons of carbon dioxide and replaces it with 1.07 tons of oxygen.

http://www.ufei.calpoly.edu/socalsaf/files/SundialSummer2003.pdf

One acre of forest absorbs six tons of carbon dioxide and puts out four tons of oxygen which we all need every day.

 Feb 24 04, 6:49 PM
gmackematix

According to Michael Faraday, in his 1849 Christmas lecture:

"A man in twenty-four hours converts as much as seven ounces of carbon into carbonic acid; a milch cow will convert seventy ounces, and a horse seventy-nine ounces, solely by the act of respiration."

He sadly doesn't give figures when he goes on to say how plants reverse the process.

 Feb 26 04, 1:40 AM

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