A few years after his gasoline “innovation,” Midgely was back. He pioneered CFCs, a magical molecule that could power reliable and efficient refrigerators (for millions of homes, not to mention air conditioners) as well as making aerosols for spray paint and anti-perspirants easier to make. Unfortunately, each molecule of CFC released into the atmosphere changes the state of thousands of molecules of ozone, the layer of our atmosphere that protects us from direct sunlight, skin cancer, and the boiling of the Antarctic region. It took a few decades, but the nations of the world got together in
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