Fig. 8

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Mean molecular mass fractions per bin of metallicity for thin disc (solid line) and thick disc (dashed line). Top panels correspond to APOGEE-DR17; bottom panels correspond to GALAH-DR3. Left panels correspond to the inner proto-planetary disc (T > 150 K); right panels correspond to the outer proto-planetary disc (T < 150 K, which includes the H2O molecule).
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