Carbon dioxide is necessary for plants. Why do we consider it as a pollutant?

A.VERIFIED ANSWERfact-checked by tutors

Carbon-di-oxide is considered as a pollutant because it is a green-house gas which is responsible for the global warming. This results in change of earth’s climate. Along with that excess CO₂ is harmful for the plants. Increased CO2 levels changes physiology, growth and chemistry of plants. High CO2 concentration also causes suffocation, hard breathing and choking issues.

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