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ACIDRAIN
BIOETHICS
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DEFORESTATION
ECOLOGY
GREENHOUSE
OZONELAYER
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R | H | P | J | O | F | M | R | Y | H | A | V | F | E | D |
W | R | T | O | U | M | K | K | H | E | P | Q | Z | D | Q |
L | B | K | Q | H | W | Y | G | O | L | O | C | E | K | P |
J | P | A | Z | F | Y | K | Z | U | W | K | F | R | R | S |
U | R | E | Y | A | L | E | N | O | Z | O | E | A | U | Y |
C | E | S | U | O | H | N | E | E | R | G | C | C | P | W |
V | V | U | Y | A | J | A | V | E | Z | H | S | I | I | Y |
B | M | W | I | A | D | M | S | M | E | C | U | D | C | U |
F | Q | Q | S | S | Y | T | K | L | I | E | S | R | T | O |
Q | Z | N | X | I | A | D | C | H | N | M | S | A | I | K |
T | D | M | X | T | S | A | T | E | L | E | J | I | V | V |
F | C | M | I | F | R | E | U | X | X | R | W | N | J | S |
V | V | O | J | S | O | N | J | B | R | C | W | A | Q | U |
I | N | M | O | I | Z | K | V | S | F | C | Z | C | I | N |
G | U | N | B | I | O | W | A | R | F | A | R | E | X | B |
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