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