There had to be unanimity but that made it really hard for the league to do anything and the league suffered badly from the absence of major powers. Germany, Japan and Italy left and there was a lack of U.S participation
Miners used canaries in mines to detect dangerous gases.
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The answer is: [D]: "adapting to droughts and few sources of water" .
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Regular answer:
Pure water
scientific answers:
hydrogen hydroxide
H2O
di-hydrogen oxide
