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