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| Date | Grid | Clue | Author |
|---|---|---|---|
| Thursday, February 7, 2013 | 31D | Global warming subj. | David Levinson Wilk |
| Wednesday, February 6, 2013 | 19A | Green sci. (5) | Peter A. Collins |
| Thursday, December 6, 2012 | 40D | Subj. for a forest ranger | Jill Denny and Jeff Chen |
| Tuesday, May 15, 2012 | 15D | Green sci. (5) | Susan Gelfand |
| Friday, March 16, 2012 | 11D | Bionomics: Abbr. (2) | Joel Fagliano |
| Tuesday, March 6, 2012 | 2D | Environmental sci. (7) | Wesley Johnson |
| Friday, May 27, 2011 | 58A | Naturalist's subj. | Ashton Anderson |
| Monday, April 18, 2011 | 59D | Environmental subj. | James Tuttle |
| Monday, September 27, 2010 | 42D | Environmental sci. (7) | Janice M. Putney |
| Wednesday, July 28, 2010 | 57D | Life sci. course | Howard Baker |
| Thursday, July 8, 2010 | 23A | Greenpeace subj. (2) | John Farmer |
| Tuesday, May 25, 2010 | 27D | Earth Day subj. (7) | Sarah Keller |
| Sunday, November 22, 2009 | 13D | Reforestation subj. | Patrick Merrell |
| Sunday, November 1, 2009 | 73D | Sci. specialty | Matt Ginsberg and Pete Muller |
| Tuesday, September 22, 2009 | 54D | Green sci. (5) | Gail Grabowski |
| Monday, July 6, 2009 | 26D | Environmental sci. (7) | Fred Piscop |
| Monday, June 29, 2009 | 14A | "Green" sci. (5) | Paula Gamache |
| Monday, March 23, 2009 | 7D | Environmental sci. (7) | Randy Sowell |
| Monday, December 8, 2008 | 14A | Earth Day subj. (7) | Sarah Keller |
| Monday, November 10, 2008 | 59D | Environmental sci. (7) | Gail Grabowski |
| Sunday, August 10, 2008 | 64D | Rachel Carson's sci. | Will Nediger |
| Saturday, June 7, 2008 | 52D | Kyoto Protocol concern: Abbr. | Karen M. Tracey |
| Sunday, January 6, 2008 | 97A | Earth Day subj. (7) | Lynn Lempel |
| Wednesday, November 28, 2007 | 64A | Sierra Club concern: Abbr. (2) | Ray Fontenot |
| Saturday, August 25, 2007 | 3D | Green's concern: Abbr. | Myles Callum |
| Saturday, June 9, 2007 | 42A | Life sci. (2) | Karen M. Tracey |
| Wednesday, May 30, 2007 | 5A | "Green" sci. (5) | Mike Nothnagel |
| Sunday, May 20, 2007 | 36A | Earth Day subj. (7) | Seth A. Abel |
| Thursday, April 26, 2007 | 54D | Sci. course (2) | Mike Nothnagel |
| Monday, April 23, 2007 | 45D | E.P.A. subj. (2) | David Pringle |
| Tuesday, October 17, 2006 | 33D | Area of E.P.A. purview: Abbr. | Alan Arbesfeld |
| Sunday, May 28, 2006 | 61A | Env. science | Timothy Powell |
| Tuesday, February 7, 2006 | 14A | Earth Day subj. (7) | Elizabeth C. Gorski |
| Sunday, January 15, 2006 | 7D | Green subj. | Richard Silvestri |
| Friday, November 25, 2005 | 19A | "Silent Spring" subj. | Joe DiPietro |
| Sunday, October 30, 2005 | 15D | Biol. branch (2) | Maxwell H. D. Johnson Jr. |
| Tuesday, September 6, 2005 | 34D | E.P.A. concern: Abbr. (6) | Barry C. Silk |
| Tuesday, May 3, 2005 | 35A | E.P.A. subj. (2) | Gary Steinmehl |
| Sunday, April 24, 2005 | 91A | Park concern: Abbr. | Brendan Emmett Quigley |
| Friday, April 15, 2005 | 20A | "Earth in the Balance" subj. | Brendan Emmett Quigley |
| Thursday, September 16, 2004 | 52D | Forester's concern: Abbr. | Paula Gamache |
| Sunday, July 11, 2004 | 25A | Kyoto treaty subj. | Randolph Ross |
| Tuesday, July 6, 2004 | 30D | Earth Day subj. (7) | Matt Skoczen |
| Wednesday, January 14, 2004 | 37D | Tree hugger's subj. | Fred Piscop |
| Thursday, September 4, 2003 | 19A | Biol. branch (2) | Nancy Salomon and Bob Peoples |
| Sunday, May 11, 2003 | 36D | Life sci. (2) | Patrick Berry |
| Monday, February 17, 2003 | 26A | E.P.A. concern: Abbr. (6) | Alan Arbesfeld |
| Sunday, September 22, 2002 | 112A | Park ranger's study: Abbr. | Alan Arbesfeld |
| Wednesday, March 20, 2002 | 65A | Earth sci. | Elizabeth C. Gorski |
| Wednesday, February 27, 2002 | 26D | E.P.A. concern: Abbr. (6) | Brendan Emmett Quigley |
| Wednesday, February 20, 2002 | 52D | Environmental sci. (7) | Marjorie Richter |
| Saturday, February 16, 2002 | 47A | Bionomics: Abbr. (2) | Frank Longo |
| Thursday, December 13, 2001 | 1A | Modern sci. course (2) | Manny Nosowsky |
| Sunday, October 7, 2001 | 16D | Environmentalist's maj. | Patrick Berry |
| Tuesday, December 26, 2000 | 66A | E.P.A. concern: Abbr. (6) | Gene Newman |
| Sunday, November 19, 2000 | 39D | E.P.A. concern: Abbr. (6) | Cathy Millhauser |
| Tuesday, May 9, 2000 | 50D | Earth Day subj. (7) | Elizabeth C. Gorski |
| Saturday, January 2, 1999 | 27A | E.P.A. concern: Abbr. (6) | Rich Norris |
| Wednesday, December 30, 1998 | 14A | Sierra Club concern: Abbr. (2) | Manny Nosowsky |
| Thursday, September 24, 1998 | 64A | Park director's concern: Abbr. | Frances Hansen |
| Tuesday, August 11, 1998 | 10D | Environmental sci. (7) | Randall J. Hartman |
| Friday, May 29, 1998 | 31A | Sci. course (2) | Fred Piscop |
| Thursday, October 17, 1996 | 16A | Green concern: Abbr. | J. R. Conrad |
| Tuesday, August 27, 1996 | 25A | Environmental study: Abbr. | D. E. Donaldson |
| Sunday, August 18, 1996 | 90A | Greenpeace subj. (2) | F. and L. Sabin |
| Wednesday, August 9, 1995 | 57A | Modern sci. course (2) | Richard Hughes |
| Wednesday, August 2, 1995 | 57D | School subj. for environmentalists | James Neal |
| Thursday, July 21, 1994 | 29A | Environmentalism: Abbr. | Betty Jorgensen |
1 result for ECOL from Variety puzzles.
| Date | Type | Grid | Clue | Author |
|---|---|---|---|---|
| December 13, 1998 | diagramless | 61A | E.P.A. concern | Frank Longo |
37 results for ECOL from older pre-Shortz puzzles.
| Date | Grid | Clue | Author | Editor |
|---|---|---|---|---|
| Thursday, December 31, 1992 | 12D | E.P.A. concern | Judith Perry | Maleska |
| Wednesday, September 23, 1992 | 64A | E.P.A. concern | Walter Covell | Maleska |
| Wednesday, July 15, 1992 | 13D | Bionomics: Abbr. | Eugene T. Maleska | Maleska |
| Tuesday, August 27, 1991 | 33A | E.P.A. concern | Fred Toole | Maleska |
| Sunday, April 7, 1991 | 81D | Environmental subj. | Valerie Meunier | Maleska |
| Tuesday, January 29, 1991 | 30D | Coll. subject | Melvin Kenworthy | Maleska |
| Monday, January 21, 1991 | 49A | Bionomics: Abbr. | Fred Toole | Maleska |
| Monday, October 8, 1990 | 58D | Environmentalist's subj. | Fred Toole | Maleska |
| Tuesday, June 5, 1990 | 44A | Branch of biol. | Patterson Pepple | Maleska |
| Friday, March 10, 1989 | 57D | College subj. | William Baxley | Maleska |
| Thursday, February 23, 1989 | 10A | Environmental sci. | Bernice Gordon | Maleska |
| Thursday, February 9, 1989 | 15A | Branch of biol. | Eli Wesoff | Maleska |
| Thursday, January 19, 1989 | 45A | Environmental sci. | Jeanette K. Brill | Maleska |
| Sunday, November 13, 1988 | 89A | Environmental sci. | Robert H. Wolfe | Maleska |
| Saturday, October 8, 1988 | 24A | Environmental sci. | Kevin Boyle | Maleska |
| Friday, March 18, 1988 | 10A | E.P.A. concern | R. S. Jones | Maleska |
| Tuesday, February 16, 1988 | 66A | College subj. | Arthur W. Palmer | Maleska |
| Sunday, February 14, 1988 | 113A | E.P.A. concern | Richard Silvestri | Maleska |
| Sunday, January 17, 1988 | 111A | E.P.A. concern | Warren W. Reich | Maleska |
| Sunday, January 10, 1988 | 47D | Branch of biol. | Dale O. Burgener | Maleska |
| Sunday, December 27, 1987 | 3D | Branch of biol. | Victoria Black and Alex F. Black | Maleska |
| Wednesday, October 28, 1987 | 3D | Environmentalist's sci. | Ernie Furtado | Maleska |
| Saturday, September 12, 1987 | 13A | Environmental sci. | Larry Goldhirsch | Maleska |
| Monday, August 31, 1987 | 60A | E.P.A. concern | Sidney L. Robbins | Maleska |
| Monday, March 2, 1987 | 65A | A sci. | Sidney L. Robbins | Maleska |
| Wednesday, December 24, 1986 | 30A | Bionomics: Abbr. | H. Hastings Reddall | Maleska |
| Tuesday, April 22, 1986 | 35D | Bio. branch | Evelyn Benshoof | Maleska |
| Friday, January 24, 1986 | 15A | Concern of Rachel Carson: Abbr. | Kenneth Witte | Maleska |
| Sunday, January 12, 1986 | 50D | Environmental sci. | Brett A. Blaylock | Maleska |
| Wednesday, August 28, 1985 | 53D | E.P.A.'s concern | Peter Swift | Maleska |
| Sunday, April 28, 1985 | 112D | Bionomics: Abbr. | Jim Page | Maleska |
| Sunday, September 30, 1984 | 51D | Environment sci. | Harriet Gilson Rosenberg | Maleska |
| Monday, June 4, 1984 | 32A | Environmentalist's sci. | Burns | Maleska |
| Thursday, January 26, 1984 | 52D | Environmental sci. | Bette Sue Cohen | Maleska |
| Wednesday, October 26, 1983 | 55D | Bionomics: Abbr. | Eugene T. Maleska | Maleska |
| Sunday, May 15, 1983 | 51A | Subj. in the news | Bert Rosenfield | Maleska |
| Wednesday, May 11, 1983 | 59D | Environment: Abbr. | Barbara J. Weakley | Maleska |