Refrigeration and Air Conditioning
The process, generally used in summer air conditioning to cool and dehumidify the air, is called

Dehumidification
Humidification
Heating and humidification
Cooling and dehumidification

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Refrigeration and Air Conditioning
Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since

These react with plants and cause greenhouse effect
These react with ozone layer
These react with water vapour and cause acid rain
These react with oxygen and cause its depletion

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