| Answer | Crossword Clue |
|---|---|
| ECO | Sierra Club's preferred prefix |
| ECOL | Sierra Club's concern (abbr.) |
| MUIR | Sierra Club's first president |
| Answer | Crossword Clue |
|---|---|
| ECO | Sierra Club's preferred prefix |
| ECOL | Sierra Club's concern (abbr.) |
| MUIR | Sierra Club's first president |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.