86. The recent increase in atmospheric CO2 concentration is mainly a result of an increase in
(A) the burning of fossil fuels and wood.
(B) cellular respiration by the exploding human population.
(C) the biosphere's biomass.
(D) the absorption of infrared radiation escaping from Earth.
(E) primary production.
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題目解析 題目詢問的是近期大氣中二氧化...
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