There's a lot of nitrogen about; it is the 6th or 7th most abundant element in the solar system. <br/>
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Gas giants like Jupiter and Saturn have abundances of about 0.03% by mass, mainly in the form of ammonia.<br/>
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The jury is out for Uranus and Neptune.<br/>
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I don't think breathing gear reliability is a problem - it is a very mature technology with millenia of experience in the Traveller setting. <br/>
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Operator error? Probably mitigated by inbuilt decision support systems and safety monitoring by Tech Level 10 at the latest.<br/>
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This doesn't apply to "hold my beer and watch this" scenarios.<br/>
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Rob O'Connor<br/>
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