Each square meter of an actively growing forest fixes on average each year 1 kg of carbon from the atmosphere into plant matter through photosynthesis. the atmosphere is approximately by volume 20% o2and 80% n2, but also contains 0.046% co2 by weight.

a. what volume of air at 25°c and 1 atm is needed to provide this 1 kg of carbon?
b. how much carbon is present in the entire atmosphere lying above each square meter of the earth's

surface?

(hint: the atmospheric pressure is a consequence of the force exerted by all the air above the surface; 1 atm is equivalent to 1.0332 104 kg m-2)

c. at the current rate of utilization, how long would it take to use all the co2 in the entire atmosphere directly above a forest?