Question

1. which gas is a major contributor to the greenhouse effect?

a. oxygen
b. carbon dioxide
c. nitrogen
d. argon

Explanation:

The greenhouse effect is the process where certain gases trap heat in the Earth's atmosphere. Oxygen, nitrogen, and argon are major components of the atmosphere but do not significantly contribute to trapping heat. Carbon dioxide ($\text{CO}_2$) is a well - known greenhouse gas as it can absorb infrared radiation and trap heat, making it a major contributor to the greenhouse effect.

Answer:

b. Carbon dioxide