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