Answer: ozonelayer

AnswerCrossword Clue
OZONELAYERHigh-level stratum
OZONELAYERCovering with a hole in it
OZONELAYERProtection from ultraviolet rays
OZONELAYERHoley protector
OZONELAYERStratospheric 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