Remember when the Environmental Protection Agency’s ban on chlorofluorocarbons, or CFCs, because they punched holes in the ozone layer, forced refrigerator manufacturers to switch to more environmentally friendly refrigerants?

The bad CFCs were duly replaced with supposedly good hydrofluorocarbons, or HFCs, which don’t destroy ozone. So everybody stopped worrying about the ticking time bombs in their kitchens that were threatening to destroy the Earth’s protective mantle while keeping the microbrew cold and the organic veggies fresh.