Question

Which of the following are true regarding ${\text{CO}}_2$?

a. Excess of ${\text{CO}}_2$ acts as a pollutant
b. Plants take in ${\text{CO}}_2$ for photosynthesis
c. Deforestation leads to decrease in the amount of ${\text{CO}}_2$ in air
d. Less quantity of ${\text{CO}}_2$ causes rise in temperature

• A. a and b
• B. a, b and d
• C. a, b and c
• D. b and c

Answer 1

The correct option is A

a and b

• Excess ${\text{CO}}_2$ content in atmosphere traps solar heat resulting in an increase in the average temperature of earth. This greenhouse gas hence acts as a pollutant which causes global warming.
• Plants take in ${\text{CO}}_2$ for photosynthesis in the daytime to produce food.
• Deforestation leads to increase in the amount of ${\text{CO}}_2$ in air.