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Dry Ice Safety
"Dry Ice is frozen carbon dioxide. Unlike most solids, it does not melt into a liquid, but instead changes directly into a gas. This process is called sublimation." This site describes safety precautions for using dry ice, such as not touching it with your skin, never placing it in an unventilated area, and not storing it in a freezer. From the National Weather Service Forecast Office, Las Vegas, Nevada.
http://www.wrh.noaa.gov/vef/kids/dryice.php
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