CorrelateAI › Pairs
Atmospheric CO₂ (Mauna Loa) vs US Population
Atmospheric CO₂ (Mauna Loa) and US Population correlate at r = +0.99 over 66 years (1960–2025), p < 0.0001. With the time trend removed, r = +0.28. Likely spurious (shared time trend).
Verdict: Likely spurious (shared time trend). Both series mostly just trend over time. After removing that trend the correlation collapses to 0.28 — the relationship is probably coincidental, not causal.
- Pearson r
- +0.99
- p-value
- < 0.0001
- Years compared (n)
- 66 (1960–2025)
- 95% confidence interval
- 0.99 to 0.99
- Correlation with the time trend removed
- +0.28
Sources
- Atmospheric CO₂ (Mauna Loa) (ppm): NOAA GML. Annual mean atmospheric carbon dioxide measured at Mauna Loa Observatory, Hawaii (NOAA GML).
- US Population (people): World Bank. US Population (World Bank indicator SP.POP.TOTL).
Related pairs
- US Adult Obesity vs US Population (r = +1.00)
- Atmospheric CO₂ (Mauna Loa) vs US GDP per Capita (r = +0.99)
- US Resident Patent Applications vs US Population (r = +0.98)
- Atmospheric CO₂ (Mauna Loa) vs US GDP (current US$) (r = +0.98)
- US Median Age vs US Population (r = +0.98)
- Atmospheric CO₂ (Mauna Loa) vs US Cereal Yield (r = +0.98)
Correlation does not imply causation. How the verdict is worked out.