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 | F | I | E |
| N | Q | N | P | N | R | V | F | Q | H | T | N | S |
| E | Z | J | P | O | T | E | N | O | Z | O | E | L |
| R | V | Y | R | I | X | H | K | E | I | Z | F | A |
| G | N | I | Z | T | A | M | P | T | W | S | R | S |
| Y | O | M | E | E | Q | Z | A | L | E | R | N | L |
| E | I | T | H | L | X | V | C | C | H | M | Z | M |
| T | T | Y | T | P | R | P | R | N | Q | R | P | Q |
| A | U | I | F | E | O | U | L | K | T | E | E | G |
| M | L | O | S | D | O | R | H | O | T | Q | O | S |
| I | L | N | K | S | K | L | V | S | I | J | J | Q |
| L | O | Y | E | J | T | R | A | R | Q | T | U | E |
| C | P | R | E | N | E | W | A | B | L | E | Y | F |
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