Question

If the $C{O}_2$ content of the atmosphere is as high as 300 parts per million, then:

• A. All plants would be killed.
• B. The plants would not grow properly.
• C. Plants would grow for some time and then die.
• D. The plants would thrive well.

Answer 1

The correct option is D The plants would thrive well.

The photosynthetic rate is influenced by many external (light, temperature, carbon dioxide, water, oxygen) and internal (chlorophyll content, protoplasmic condition, accumulation of end products) factors. The concentration of carbon dioxide in the atmosphere is 0.03 percent (300 parts per million). Plants can thrive well in this condition.