How does the proportion of carbon dioxide in the atmosphere differ between Earth and Venus?

Question

A. Venus's atmosphere has a higher proportion of carbon dioxide than earth's, so greenhouse gasses trap more heat.
B. Venus's atmosphere has a higher proportion of carbon dioxide than earth's, so greenhouse gasses trap less heat.
C. Venus's atmosphere has a lower proportion of carbon dioxide than earth's, so greenhouse gasses trap less heat.
D. Venus's atmosphere has a lower proportion of carbon dioxide than earth's, so greenhouse gasses trap more heat.

Answer 1

The correct answer is:

A. Venus's atmosphere has a higher proportion of carbon dioxide than Earth's, so greenhouse gases trap more heat.

Venus has an atmosphere that is about 96.5% carbon dioxide, which contributes to an extremely strong greenhouse effect, leading to very high surface temperatures. In contrast, Earth's atmosphere contains about 0.04% carbon dioxide.