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From concerns about bathing children in mixtures containing antifreeze-like alcohols to immersing actors in oxygen-poor dry ice and liquid nitrogen. So when a Hollywood script called for day-long filming in a fog-laden set, producers turned to chemical engineer Jim Foley. He knew how to super-cool air, liquefying and separating its chemical parts, including oxygen. Putting them back together to create a breathable fog isn't as easy, but he engineered the perfect technique and won an Academy Award for the "synthetic air" first used in the Schwarzenegger film Batman and Robin. With the National Academy of Engineering, Randy Atkins, WTOP Radio.