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Home » Discuss » Archives » General Discussion: Presidential (Through Nov 2009)

elleng

(1000+ posts) Send PM | Profile | Ignore

Sun May-10-09 11:14 PM
Response to Original message

1. DuPont

began to phase out its production of Freon CFCs in the 1980s after federal regulatory agencies banned their use because they harm the Earth's ozone layer.<5>

In the 1990s, most uses of Freon chlorofluorocarbons (CFCs) were phased out.

The Montreal Protocol on Substances that Deplete the Ozone Layer classifies Freon-11 and Freon-12 as Annex A substances and bans their production and consumption as of 1996.

The interim replacements for CFCs are hydrochlorofluorocarbons (HCFCs), which contain chlorine that depletes stratospheric ozone, but to a much lesser extent than CFCs.<6>

http://en.wikipedia.org/wiki/Freon

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