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