Respuesta :
It will take 111190 GT/ 158.5 GT = 701.5 years to exhaust the fossil fuels If every year 158.5 GT of fuel is used up.
Total Carbon storage in gigatons for the following spheres of the earth are,
Atmosphere: 750 GT
Geosphere: (66000+300+3000+1580)GT = 70880 GT
Oceans:1020 GT+ 38000 GT= 39020 GT
Biosphere: 540 GT
Storage (Gigatons) % of Total Storage
Atmosphere: 750 GT 0.67%
Geosphere: 70880 GT 63.75%
Oceans: 39020 GT 35.1%
Biosphere: 540 GT 0.48%
Total Storage: 111190 GT
The carbon exchange due to plant growth and decomposition removes more carbon from the atmosphere than they put into it. Exchange between industries ,mining ,agriculture and cities in the form of fossil fuel burning put more carbon into the air than they remove. Based on the carbon emission rates listed in the box L5, a total of 158.5 GT carbon is emitted per year into the atmosphere by all sources. The double of this amount that is the total carbon emission in the atmosphere two times of the current emission rate) is 158.5 x 2 = 317 GT .If emission stayed fixed at the given rates, the time required by the industrial society to double the amount of current carbon amount in the atmosphere will be Industries ,mining ,agriculture and cities in the form of fossil fuel burning add 7GT/yr of carbon to the atmosphere. Therefore 317 GT of carbon will be added in 317/7 = 45.29 years.
Industrial society will add 7GT in 1 year.
Industrial society will add 317 GT in 317/7=45.29 years.
According to box L4 the total fossil fuels reserves is about 111190 GT.
According to box L5 , the number of years it would take to exhaust the fossil fuels reserves will be appx. 701.51 years.
Checking the amount of carbon emitted into the atmosphere from box L5, we can estimate that about (90+1.5+ 7+60) GT = 158.5 GT of carbon is emitted into the atmosphere every year that means the carbon in the fossil fuel is used up. The total reserve is about 111190 GT.
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