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