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Predominance diagrams

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Reaction path calculations

Fitting

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Weekly average CO2 at Mauna Loa

Oct 25, 2026
427.28 ppm
1 year ago
425.16 ppm
10 years ago
402.47 ppm
Pre-industrial
270 ppm
Year-on-year change
2.12 ppm

When will the Year-on-year increase come down to zero, or at least show a definite downturn? At the moment, it appears to be still on an upward trend! The reason is pretty clear.