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