Abstract
Snow business This year’s Winter Olympics has drawn to a close and we are all turning our attention to the Winter Paralympics in March. A perfect time, Newscripts decided, to take a sideways look at some of the medal-winning science that made the games in Beijing possible. One of the key innovations, much covered in the news, was the reliance on artificial snow to build the slopes and half-pipes for the snow sports. As C&EN foretold , the 2022 Winter Olympics relied almost entirely on snowmaking, but not because of the temperature. Instead, the issue in Beijing is the lack of seasonal precipitation. Snowmakers in Beijing did not have to rely on chemical nucleators to produce the snow, as many winter sports venues do, just good old-fashioned cold nights to freeze the water shot into the air by machinery. That means that what the 2022 games needed is water—and lots
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