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Atmospheric Methane (global) vs US Agriculture Value Added

Atmospheric Methane (global) and US Agriculture Value Added correlate at r = -0.65 over 25 years (1997–2021), p = 4.6e-4. With the time trend removed, r = -0.23. Interpret with caution.

Verdict: Interpret with caution. Much of the apparent link is driven by a shared time trend: r falls from -0.65 to -0.23 once the trend is removed.

Pearson r
-0.65
p-value
4.6e-4
Years compared (n)
25 (1997–2021)
95% confidence interval
-0.83 to -0.34
Correlation with the time trend removed
-0.23

Sources

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