Release of cfcs and similar compounds are a possible cause of
a destruction of ozone in the upper atmosphere

b greenhouse gas build-up in the lower atmosphere

c increase in atmospheric carbon dioxide concentration

d acid rain in the northeast u. s.

Ozone depletion

Explanation:

Man-made compounds such as chlorofluorocarbons (CFCs), hydrofluorocarbons (HCFCs) and halons destroy ozone in the upper atmosphere (stratosphere). The stratospheric ozone layer makes life possible by shielding the earth from harmful ultraviolet (UV-B) rays generated from the sun.

the way that the mass of carbon can be conserved through cellular respiration is through a process/law called the law of conservation of mass which even tho it undergoes a process, mass is not be destroyed or changed