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