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one major contributor to global warming is an increased amount of carbo…

Question

one major contributor to global warming is an increased amount of carbon dioxide in the atmosphere. if the number of living plants significantly increased,
there might not be a noticeable impact on global carbon dioxide levels.
global warming might get worse because of the increase in carbon dioxide caused by plants.
global warming might be reduced because of the decrease in carbon dioxide caused by photosynthesis.
global warming might get worse because of the increase in oxygen caused by plants.

Explanation:

Brief Explanations

Las plantas realizan fotosíntesis, proceso que absorbe dióxido de carbono ($CO_2$) del aire para producir energía, reduciendo sus niveles atmosféricos. Al ser $CO_2$ un gas de efecto invernadero, una disminución de sus niveles podría mitigar el calentamiento global. Las otras opciones son incorrectas: plantas no aumentan $CO_2$ de manera neta (respiración es compensada por fotosíntesis en organismos vivos), oxígeno no causa calentamiento global, y un aumento significativo de plantas sí afectaría los niveles de $CO_2$.

Answer:

global warming might be reduced because of the decrease in carbon dioxide caused by photosynthesis.