HCFCs are refrigerants that deplete ozone. They are not made from corn. https://...

		spodek on May 2, 2021 \| parent \| context \| favorite \| on: Michigan asphalt company paves first US public roa... HCFCs are refrigerants that deplete ozone. They are not made from corn. https://en.wikipedia.org/wiki/Chlorofluorocarbon