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