As of what date did it become unlawful to release Class 1 and Class II

refrigerants to the atmosphere?

a. July 1, 1992

b. July 1, 1993

c. November 14, 1994

d. January 1, 1996 - ANS a. July 1, 1992



What is the ozone layer and why is it important to us on Earth?

a. Thin layer of R-22 in the atmosphere that filters UV.

b. Protective shield for Earth from the sun's harmful ultraviolent (UV)

rays in the stratosphere layer that extends about 6 to 30 miles above

earth

c. Thin la...
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