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