The poisonous gas can cause "dizziness, unconsciousness and death," a report says.
Sala, 28, and pilot David Ibbotson, 59, crashed on 21 January while travelling from Nantes in France to Cardiff.
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The poisonous gas can cause "dizziness, unconsciousness and death," a report says.
Sala, 28, and pilot David Ibbotson, 59, crashed on 21 January while travelling from Nantes in France to Cardiff.