Question

why do carbon dioxide concentrations and surface temperatures show the relationship seen in the graph?
a. because higher carbon dioxide levels mean less heat is retained in earths atmosphere
b. because lower carbon dioxide levels mean less heat is retained in earths atmosphere
c. because higher carbon dioxide levels mean more heat is retained in earths atmosphere
d. because lower carbon dioxide levels mean more heat is retained in earths atmosphere

Explanation:

Carbon dioxide is a greenhouse gas. Higher levels of greenhouse gases like \(CO_2\) trap more heat in the Earth's atmosphere. This is a fundamental concept in environmental science related to the greenhouse effect. Looking at the options:

• Option A: Higher \(CO_2\) levels mean more heat is retained (correct as per the greenhouse effect principle).
• Option B: Lower \(CO_2\) levels would mean less heat retention (opposite of what the graph likely shows as \(CO_2\) and temperature seem to have a positive correlation).
• Option C: Higher \(CO_2\) (not lower) is related to more heat retention.
• Option D: Lower \(CO_2\) (not higher) would be related to less heat retention if the logic was followed, but the general principle is higher \(CO_2\) - more heat retention.

Answer:

A. because higher carbon dioxide levels mean more heat is retained in Earth’s atmosphere