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