Question

which of the following changes to earths atmosphere would increase the greenhouse effect? select all that apply.
decreasing the concentration of ch₄
increasing the number of o₂ molecules
increasing the concentration of co₂
increasing the amount of water vapor

Explanation:

Greenhouse gases trap heat in the atmosphere, amplifying the greenhouse effect. $\text{CH}_4$ (methane) and $\text{CO}_2$ (carbon dioxide) are primary greenhouse gases; increasing their concentrations enhances heat retention. Water vapor is also a potent greenhouse gas, so more water vapor increases the effect. $\text{O}_2$ (oxygen) does not trap heat, so changing its levels does not affect the greenhouse effect.

Answer:

• increasing the concentration of $\text{CO}_2$
• increasing the amount of water vapor