To simulate the atmosphere, they have built a special cloud chamber of their own, with the air manufactured from scratch, using liquid nitrogen and oxygen together with precise amounts of trace compounds, including sulphuric acid and ammonia.

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Early on Open Air made the decision to build the book from scratch rather than partner with an established brand.

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Air Products makes roughly 80% of its molecules from scratch, while Praxair and other marketers simply package and resell.

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