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EPA 608 Certification Core Practice Test |Question and Answer| Graded A+
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EPA 608 Certification Core Practice Test |Question and Answer| Graded A+ As of what date did it become unlawful to release Class 1 and Class II refrigerants to the atmosphere? *Ans* July 1, 1992. What is the ozone layer and why is it important to us on Earth? *Ans* Protective shield for Eart...
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