44. What releases the highest level of greenhouse gases in the environment?
1. Regular use of old air-conditioners
2. Dumping air-conditioners with coolants
3. Dumping air-conditioners without coolants
4. Poor maintenance of air-conditioners
45. What does that (paragraph 4) refer to?
1. The leakage of F-gases
2. Information from the UN
3. Poor maintenance
4. Air-conditioning