Answer: ozonelayer

AnswerCrossword Clue
OZONELAYER

High-level stratum

OZONELAYER

Covering with a hole in it

OZONELAYER

Protection from ultraviolet rays

OZONELAYER
Holey protector
OZONELAYER
Stratospheric stratum that protects the Earth from the Sun
OZONELAYERIt's up in the air?
OZONELAYEREcological concern
OZONELAYERUltraviolet radiation blocker
OZONELAYERPurportedly weakening shield
OZONELAYERAtmospheric region with a "hole"
OZONELAYERIt's found all around the world
OZONELAYERChlorofluorocarbons damage it
OZONELAYEREnvironmentalist's concern