How would a shift in land use from forest to agriculture affect atmospheric carbon dioxide?

(a) it would have no effect.
(b) it would result in a large release of co2.
(c) it would result in a decrease in release of co2.
(d) neither forests nor crops contribute significantly to atmospheric carbon dioxide.

B) It would result in a large release of CO2

Explanation:

This simply refers to deforestation.Because the forest will be destroyed in order to farm the land

Green plants fix C02  by reducing it with  water during photosynthesis;therefore they continuously reduced  and stabilized the C02 concentration in the atmosphere.  

Atmospheric C02 absorbs excessive heat radiated from the earth surface, Thus deforestation ,increases C02 levels because green plants are destroyed, photosynthesis prevented,  therefore  increasing  the earth's  temperature   leading  to global warming.

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