stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
Global Economic Development Flashcards | StudBud
Global Economic Development
1 / 10
What is the Earth’s main protection against the sun’s damaging ultraviolet rays?
A
Gas layer
B
Oxygen layer
C
Protection layer
D
Ozone layer
Next
0
0
correct · 0:00
