noun
ADJECTIVE
▪ atmospheric , ground-level , stratospheric
VERB + OZONE
▪ deplete , destroy
▪ form , produce
▪
Ozone is formed when an electric spark is passed through oxygen.
OZONE + VERB
▪ thin
▪ disappear
OZONE + NOUN
▪ layer
▪
The ~ layer is disappearing over northern Europe.
▪ depletion , destruction , loss
▪ hole
▪ pollution
▪ concentration , levels
PHRASES
▪ damage to the ~ layer , depletion of the ~ layer , destruction of the ~ layer
▪ a hole in the ~ layer