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Atmospheric CO₂ (Mauna Loa) vs US Inflation Rate

Atmospheric CO₂ (Mauna Loa) and US Inflation Rate correlate at r = -0.29 over 65 years (1960–2024), p = 0.018. With the time trend removed, r = -0.19. Holds up after detrending.

Verdict: Holds up after detrending. Statistically significant (p = 0.018) and the association survives trend removal (detrended r = -0.19). Correlation still isn't causation, but this one isn't an obvious artifact.

Pearson r
-0.29
p-value
0.018
Years compared (n)
65 (1960–2024)
95% confidence interval
-0.50 to -0.05
Correlation with the time trend removed
-0.19

Sources

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Correlation does not imply causation. How the verdict is worked out.