Environmental issues
Environmental issues
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CLIMATE
CONSERVATION
DEPLETION
ECOSYSTEMS
ENERGY
EXPLOIT
OZONE
POLLUTION
RENEWABLE
RESOURCES
WASTE
| V | X | H | U | F | S | A | X | S | W | I | P | C |
| S | E | C | O | S | Y | S | T | E | M | S | O | L |
| T | P | N | Z | W | A | S | T | E | H | N | L | I |
| D | J | B | I | D | B | Q | E | T | S | C | L | M |
| O | N | O | I | T | E | L | P | E | D | R | U | A |
| N | B | G | J | N | C | Z | R | S | E | E | T | T |
| M | L | Z | E | Y | J | V | I | S | X | N | I | E |
| Y | C | R | A | Z | A | N | O | I | P | E | O | R |
| T | G | M | E | T | Q | U | Z | M | L | W | N | R |
| Y | K | S | I | J | R | O | O | V | O | A | G | U |
| R | C | O | W | C | Z | N | N | I | I | B | U | S |
| Y | N | U | E | V | N | H | E | H | T | L | N | J |
| O | A | S | P | I | X | M | B | L | M | E | N | H |
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