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Atmospheric Methane (global) vs US Coal Consumption

Atmospheric Methane (global) and US Coal Consumption correlate at r = -0.68 over 42 years (1984–2025), p < 0.0001. With the time trend removed, r = -0.41. Holds up after detrending.

Verdict: Holds up after detrending. Statistically significant (p = < 0.0001) and the association survives trend removal (detrended r = -0.41). Correlation still isn't causation, but this one isn't an obvious artifact.

Pearson r
-0.68
p-value
< 0.0001
Years compared (n)
42 (1984–2025)
95% confidence interval
-0.82 to -0.48
Correlation with the time trend removed
-0.41

Sources

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