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Speaker 1: Welcome to brain Stuff from how stuff works dot com

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Speaker 1: where smart Happens. Hi Am Marshall Brain with today's question,

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Speaker 1: why is dry ice dangerous? There are two things that

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Speaker 1: can make dry ice dangerous. The first is its temperature,

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Speaker 1: and the second is the carbon diox eye gas it

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Speaker 1: gives off. If you ever have a chance to handle

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Speaker 1: dry ice, you want to be sure to wear heavy gloves.

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Speaker 1: The super cold surface temperature can easily damage your skin

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Speaker 1: if you touch it directly. For the same reason, you

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Speaker 1: never want to taste or swallow dry ice either. Another

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Speaker 1: important concern with dry ice is ventilation. You want to

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Speaker 1: make sure that the area is very well ventilated. Carbon

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Speaker 1: dioxide is heavier than air and it can concentrate in

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Speaker 1: low areas or in enclosed spaces like a car or

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Speaker 1: a room. Normal air is eight percent nitrogen oxygen and

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Speaker 1: hardly any carbon dioxide at all. If the concentration of

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Speaker 1: carbon dioxide in the air rises above five, carbon dioxide

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Speaker 1: can become toxic. Be sure to ventilate any area that

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Speaker 1: contains dry ice, and do not transport it in a

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Speaker 1: closed vehicle. Be sure to check out our new video podcast,

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Speaker 1: we explore the most promising and perplexing possibilities of tomorrow.

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