Many ice arenas weigh whether to upgrade as popular but polluting refrigerant is phased out
The clock is ticking for Minnesota’s indoor ice rinks.
By 2020, the refrigerant chemical now used at half the state’s 240 arenas to make ice no longer will be manufactured or imported into the U.S. as part of a global effort aimed at ridding the world of greenhouse gases linked to depletion of the ozone layer.
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