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Advice is like snow; The softer it falls the longer it dwells upon, and the deeper it sinks into, the mind
Chlorofluorocarbons
แปลว่า(Environmental Engineering) Synthetic organic compounds used for refrigerants, aerosol propellants (prohibited in the U.S.), and blowing agents in plastic foams. CFCs migrate to the upper atmosphere destroying ozone and increasing global warming. Typical atmospheric residence times are 50 to 200 years.
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