| Since about 1992, the air conditioning systems of newly manufactured cars have been successively changed to refrigerant R134a. This refrigerant contains no chlorine and thus does not damage the ozone layer. |
| Up until about 1992, air conditioning systems were charged with refrigerant R12. As it contains chlorine atoms, this CFC is extremely prone to destroying ozone, and also to contributing to the greenhouse effect. |
| There are programs for exchanging old air conditioning systems containing the ozone-damaging refrigerant R12. |
| For environmental protection reasons, refrigerant must not be released in the atmosphere (Legal texts and guidelines). → Chapter |
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