| Date | Grid | Clue | Author | Editor |
|---|---|---|---|---|
| Sun, Jan 27, 2013 | 23A | Molecules in natural gas | Jeff Chen | Shortz |
| Fri, Jul 13, 2007 | 58A | Natural gas components | Manny Nosowsky | Shortz |
| Fri, Apr 21, 2006 | 60A | Some soil contaminants | Manny Nosowsky | Shortz |
| Fri, Aug 30, 2002 | 42D | Some fuels | Patrick Merrell | Shortz |