an increase in the air temperature a decrease in the air density an increase in the intensity of visible light a decrease in the thickness of the ozone layer
I gave my students this multiple choice question: Which of these is the most common result of greenhouse gases altering the atmosphere of Earth?

Only one answer is correct among these 4 choices:
- an increase in the air temperature
- a decrease in the air density
- an increase in the intensity of visible light
- a decrease in the thickness of the ozone layer

Could you tell me which one is correct?

an increase in the air temperature