Increase in the percentage of fauna and decre | vedclass

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(A) The increase in the percentage of fauna (animals) leads to an increase in the production of $CO_2$ through respiration.Simultaneously,the decrease

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Percentage of $CO_2$

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(A) The increase in the percentage of fauna (animals) leads to an increase in the production of $CO_2$ through respiration.Simultaneously,the decrease in flora (plants) reduces the rate of photosynthesis,which is the primary process for the consumption of $CO_2$.Consequently,the imbalance between the production and consumption of $CO_2$ leads to an overall increase in the percentage of $CO_2$ in the atmosphere,contributing to global warming.

Column-$I$	Column-$II$
$(a)$ Small fish	$(1) \;25 \;ppm$
$(b)$ Zooplankton	$(2) \;2 \;ppm$
$(c)$ Fish-eating birds	$(3) \;0.5 \;ppm$
$(d)$ Large fishes	$(4) \;0.04 \;ppm$

Increase in the percentage of fauna and decrease in flora may be dangerous because it enhances

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Column-$I$ Column-$II$

$(a)$ Small fish $(1) \;25 \;ppm$

$(b)$ Zooplankton $(2) \;2 \;ppm$

$(c)$ Fish-eating birds $(3) \;0.5 \;ppm$

$(d)$ Large fishes $(4) \;0.04 \;ppm$

The quantity of $CO_2$ in the atmosphere is about (in $\%$)

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