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 | C | R | P |
| E | L | B | A | W | E | N | E | R | B | P | N | W |
| R | T | I | O | L | P | X | E | E | P | O | B | U |
| K | X | W | U | E | T | S | A | W | I | F | U | Y |
| B | L | W | M | O | O | P | O | T | S | Z | G | S |
| C | Z | X | H | U | A | U | A | W | G | R | V | P |
| I | I | Q | R | D | B | V | J | N | E | P | U | X |
| X | T | C | B | D | R | A | X | N | D | U | P | F |
| D | E | X | D | E | P | L | E | T | I | O | N | S |
| S | E | O | S | O | J | O | Z | N | F | Z | K | U |
| W | F | N | T | R | Q | R | X | T | V | O | C | Q |
| P | O | L | L | U | T | I | O | N | H | N | Z | S |
| C | L | I | M | A | T | E | F | T | F | E | C | S |
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