If the CO₂ content of atmosphere is as high as 300 parts per million

Options

(a) All plants will be killed
(b) The plants would not grow properly
(c) Plants would grow for sometime and then die
(d) The plants would thrive well

Correct Answer:

The plants would thrive well

Explanation:

As 300 ppm is normal concentration of CO₂, hence there is no effect on plant.