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US Annual CO₂ Emissions vs US Federal Debt Outstanding

US Annual CO₂ Emissions and US Federal Debt Outstanding correlate at r = +0.58 over 225 years (1800–2024), p < 0.0001. With the time trend removed, r = +0.21. Holds up after detrending.

Verdict: Holds up after detrending. Statistically significant (p = < 0.0001) and the association survives trend removal (detrended r = 0.21). Correlation still isn't causation, but this one isn't an obvious artifact.

Pearson r
+0.58
p-value
< 0.0001
Years compared (n)
225 (1800–2024)
95% confidence interval
0.49 to 0.66
Correlation with the time trend removed
+0.21

Sources

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