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KANSAS CITY, Mo. — A refrigerant used in home air conditioners is going away. The most common air-conditioning coolant for decades was R-22, referred to as Freon. Production of it ends this year.

The most common air-conditioning coolant for decades was R-22, referred to as Freon. Production of it ends this year. It is being replaced by a more environmentally friendly coolant -- 410A.

The most common air-conditioning coolant for decades was R-22, referred to as Freon. Production of it ends this year. It is being replaced by a more environmentally friendly coolant -- 410A.

The most common air-conditioning coolant for decades was R-22, referred to as Freon. Production of it ends this year. It is being replaced by a more environmentally friendly coolant -- 410A.