All of the following have occurred over long periods of time on Earth. Which one is not thought to have played a major role in long-term changes in Earth's climate?
A. changes in the Earth's axis tilt
B. changes in the Earth's overall reflectivity
C. a gradual rise in the atmospheric content of oxygen
D. changes in the atmospheric concentration of greenhouse gases
Answer:C
All of the following have occurred over long periods of time on Earth. Which one is not thought to have played a major role in long-term changes in Earth's climate?
A. changes in the Earth's axis tilt B. changes in the Earth's overall reflectivity C. a gradual rise in the atmospheric content of oxygen D. changes in the atmospheric concentration of greenhouse gases