stratosphere composition causes higher levels of what reaching Earth
aliens dust scattered light photons emissions ozone UV radiation sunlight
A B C D E F G H
Ozone depletion in the stratosphere is a global problem .
stratosphere composition causes higher levels of UV radiation reaching Earth
stratosphere composition causes higher levels of what reaching Earth (A) aliens (B) dust (C) scattered light (D) photons (E) emissions (F) ozone (G) UV radiation (H) sunlight