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