Question

1. what are the major greenhouse gases contributing to global warming?

a. carbon dioxide and methane emissions
b. helium and hydrogen release into the air
c. oxygen and nitrogen absorbed by plants
d. neon and argon found in rare air pockets

Explanation:

To determine the major greenhouse gases, we analyze each option:

• Option a: Carbon dioxide ($\text{CO}_2$) and methane ($\text{CH}_4$) are well - known major greenhouse gases that trap heat in the atmosphere and contribute to global warming.
• Option b: Helium and hydrogen are not greenhouse gases. Helium is an inert gas and hydrogen, in the atmospheric context, does not have a significant greenhouse effect.
• Option c: Oxygen and nitrogen are the main components of the atmosphere. Oxygen is used in respiration and nitrogen is relatively inert in terms of the greenhouse effect. Plants absorb carbon dioxide, not oxygen and nitrogen for the purpose of contributing to or mitigating greenhouse effects in the way described.
• Option d: Neon and argon are noble gases and do not act as greenhouse gases.

Answer:

a. Carbon dioxide and methane emissions