Ozone depletion in the upper atmosphere caused by the release of _____ gases.

a) Helium and Hydrogen

b) Neon and Argon

c) Nitrogen and Oxygen

d) Chlorine and Bromine 

Ozone depletion in the upper atmosphere caused by the release of Chlorine and Bromine gases. Ozone depletion causes major environmental threats as ultraviolet rays can penetrate, which result in diseases such as skin cancer.