Question id 200 - Meteorology - Quiz BPL Hot Air - Balloon Pilot License

Oxygen 78 % Water vapour 21 % Nitrogen 1 %
Oxygen 21 % Water vapour 78 % Noble gases / carbon dioxide 1 %
Nitrogen 21 % Oxygen 78 % Noble gases / carbon dioxide 1 %
Oxygen 21 % Nitrogen 78 % Noble gases / carbon dioxide 1 %
X
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