Question

‘Ozone-hole’ means
(a) a large sized hole in the ozone layer
(b) thinning of the ozone layer
(c) small holes scattered in the ozone layer
(d) thickening of ozone in the ozone layer

Answer 1

Answer:

thinning of the ozone layer

hope it helps you.

Answer 2

Answer:

A large sized hole in the ozone layer