The addition of a greenhouse gas which absorbs in both bands would then increase the absorption in the unsaturated band but not in the saturated band

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The addition of a greenhouse gas which absorbs in both bands would then increase the absorption in the unsaturated band but not in the saturated band.
Santander SDR airport 100 Km

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Santander (SDR) airport 100 Km
Looking which airport for Valena do Minho

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Looking which airport for Valenca do Minho?