Question

multiple choice 2 points
what was one major consequence of high co₂ levels during peak pangaea greenhouse conditions?
desertification at coastlines
globally warmer conditions, even at the poles
decline in sea levels
expansion of polar ice sheets

Explanation:

Carbon - dioxide is a greenhouse gas. High levels of CO₂ trap more heat in the Earth's atmosphere, leading to global warming. During peak Pangaea greenhouse conditions, high CO₂ levels would cause globally warmer conditions, even at the poles. Desertification at coastlines is not a direct major consequence of high CO₂ in this context. High CO₂ leads to sea - level rise due to thermal expansion and melting of ice, not a decline. And high CO₂ levels would cause melting of polar ice sheets, not expansion.

Answer:

B. Globally warmer conditions, even at the poles