| 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. Due to its chlorine atoms, this CFC has a high potential for destroying ozone and, in addition, a potential for increasing the greenhouse effect. |
| There are programs for exchanging old air conditioning systems containing the ozone-damaging refrigerant R12. |
| To protect the environment, no refrigerant should be released into the atmosphere → Chapter (statutory texts and instructions). |
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