ECO is an answer for the NYT Crossword puzzle. Here you can get the history and usage for ECO in NYT Crossword from 1994.
This "ECO" answer was first appeared in "9 Jan 1994" NYT Crossword for the hint of "“Foucault’s Pendulum” author (11)". It was authored by Mel Rosen. Recently, the "ECO" answer has been used for "9 Nov 2023" NYT Crossword for the hint of "Prefix with tourism (16)". It was authored by Simeon Seigel. In the NYT Crossword, this answer has been used most frequently for the hints: "Green prefix (30)", "Prefix with system (18)", "Prefix with tourism (16)", "Green: Prefix (30)", "Prefix with friendly (19)", "Environmental prefix (10)", "Prefix with warrior (7)", "Prefix with conscious (7)", "Author Umberto (14)", "“Foucault’s Pendulum” author (11)", "Prefix with -cide (7)", "Prefix with sphere (6)". "ECO" appeared 331 times in Shortz Era puzzles. So lets take a look for clue and answer history of "ECO" word.
| Date | Grid | Clue | Author |
|---|---|---|---|
| 9 Nov 2023 | 10D | Prefix with tourism | Simeon Seigel |
| 5 Nov 2023 | 115D | Lead-in to sphere or system | Rich Katz |
| 19 Sep 2023 | 25A | Prefix with system | Gia Bosko |
| 20 Aug 2023 | 52A | “Green” | Michael Schlossberg |
| 17 Aug 2023 | 61D | ___ Style gel | Erik Agard |
| 23 Jul 2023 | 42A | Green beginning | Chandi Deitmer |
| 16 Jul 2023 | 91D | Prefix with tourism | Michael Schlossberg |
| 2 Jul 2023 | 64D | Prefix with sphere or system | Rebecca Goldstein and Rafael Musa |
| 20 Jun 2023 | 30D | Green: Prefix | Aimee Lucido |
| 16 May 2023 | 16A | Green: Prefix | Katherine Baicker and Adam Wagner |
| 15 Apr 2023 | 5D | Lead-in to toxicology | Kameron Austin Collins |
| 29 Mar 2023 | 22D | Intro to -logical | Ben Zoon |
| 23 Mar 2023 | 4D | “Green” starter | David Kwong |
| 8 Mar 2023 | 1A | Prefix for the green-minded | Miranda Kany |
| 6 Mar 2023 | 16A | Good prefix for Earth Day | Lynn Lempel |
| 30 Jan 2023 | 6D | Prefix with system | David Steinberg |
| 29 Jan 2023 | 58D | Green prefix | Rich Katz |
| 15 Jan 2023 | 87D | Prefix with hotel | Michael Schlossberg |
| 24 Nov 2022 | 40D | ___-friendly | Pao Roy |
| 16 Nov 2022 | 44D | Green: Prefix | John Hawksley |
| 11 Nov 2022 | 21A | Environmentally friendly opening | Brooke Husic and Erik Agard |
| 10 Nov 2022 | 44A | Prefix with hotel | Dan Caprera |
| 25 Oct 2022 | 35D | Green prefix | Ashleigh Silveira and Nick Shephard |
| 23 Oct 2022 | 104D | ___ mode (fuel-saving feature in newer cars) | Daniel Bodily and Jeff Chen |
| 16 Sep 2022 | 61D | Prefix with conscious | Juliana Tringali Golden |
| 7 Sep 2022 | 54A | Green prefix | Ekua Ewool |
| 30 Aug 2022 | 6D | Lead-in to freak or friendly | Emily Carroll |
| 17 Aug 2022 | 62D | Prefix with friendly | Michael Paleos |
| 3 Aug 2022 | 63A | Prefix with conscious | Daniel Bodily |
| 30 Apr 2022 | 37D | Energy-saving mode in some hybrid cars | Joe DiPietro |
| 18 Apr 2022 | 49D | Green: Prefix | Carl Larson |
| 27 Mar 2022 | 4D | Prefix with system | August Lee-Kovach |
| 12 Mar 2022 | 19A | Prefix with consciousness | Natan Last |
| 1 Feb 2022 | 46D | ___-warrior (environmental activist) | Zhouqin Burnikel |
| 18 Jan 2022 | 30A | Italian author Umberto | Kate Schutzengel |
| 7 Jan 2022 | 45A | Friendly introduction? | Robyn Weintraub |
| 9 Dec 2021 | 65A | Prefix with system | Alexander Liebeskind |
| 4 Nov 2021 | 61D | Prefix with label | David Steinberg |
| 31 Oct 2021 | 17A | Kind to Mother Nature | Alex Eaton-Salners |
| 12 Oct 2021 | 8D | Prefix with tourism | Conor Sefkow |
| 9 Oct 2021 | 16A | Sustainability indicator | August Lee-Kovach |
| 29 Aug 2021 | 9D | Green prefix | Dory Mintz |
| 15 Aug 2021 | 87D | Environmental opening | Aimee Lucido and Ella Dershowitz |
| 25 Mar 2021 | 2D | Prefix with conscious | Alex Eaton-Salners |
| 18 Mar 2021 | 13D | Prefix with tourist | Tom McCoy |
| 12 Mar 2021 | 62A | Brand of hairstyling gel | Peter Wentz |
| 21 Feb 2021 | 16D | Prefix with conscious | Matthew Stock |
| 15 Feb 2021 | 42D | “Green” prefix | Meconya Alford |
| 14 Feb 2021 | 78A | Prefix with friendly | Lisa Bunker |
| 3 Jan 2021 | 119D | Prefix with warrior | Paolo Pasco |
| 30 Dec 2020 | 35D | Green prefix | Kate Hawkins |
| 2 Dec 2020 | 37D | Green: Prefix | Will Nediger |
| 3 Nov 2020 | 13D | Umberto who wrote “Foucault’s Pendulum” | Amanda Chung and Karl Ni |
| 1 Oct 2020 | 39D | Green prefix | Adam Fromm |
| 14 Sep 2020 | 34A | Prefix often associated with green | John Guzzetta |
| 9 Sep 2020 | 13A | Prefix with friendly | Jakob Weisblat |
| 6 Sep 2020 | 42A | Logical start? | David Kwong |
| 21 Jul 2020 | 5D | Prefix with system | Zhouqin Burnikel |
| 8 Jun 2020 | 29A | ___-friendly (green) | Kyle Dolan |
| 30 May 2020 | 49A | ___-conscious | Brian Thomas |
| 25 Apr 2020 | 25D | Prefix with friendly | Andrew J. Ries |
| 15 Apr 2020 | 15A | Novelist Umberto | John-Clark Levin and Jeff Chen |
| 8 Apr 2020 | 46A | “Good for the earth” prefix | Sam Buchbinder |
| 25 Mar 2020 | 24D | Prefix with system | Laura Taylor Kinnel |
| 17 Mar 2020 | 49A | Prefix with freak or warrior | Ross Trudeau |
| 13 Feb 2020 | 20D | Prefix with tourism | Amanda Chung and Karl Ni |
| 8 Feb 2020 | 51D | Prefix with system | Hemant Mehta |
| 4 Feb 2020 | 43A | Prefix with freak or friendly | Queena Mewers and Alex Eaton-Salners |
| 19 Dec 2019 | 6D | Prefix with tourist | Andy Kravis and Erik Agard |
| 31 Oct 2019 | 51A | Prefix with tourism | Ezra Brauner and Jeff Chen |
| 17 Aug 2019 | 39D | Prefix with -logical | Michael Hawkins |
| 12 Aug 2019 | 55A | Environmental prefix | Jeffrey Wechsler |
| 10 Aug 2019 | 22A | Prefix with car | Anna Gundlach and Erik Agard |
| 3 Aug 2019 | 38A | Prefix with tourism or politics | Ryan McCarty |
| 9 Jul 2019 | 20A | Prefix with tourism | Bruce Haight |
| 7 Jul 2019 | 91D | Green: Prefix | Jack Reuter |
| 5 Jun 2019 | 10D | Prefix with conscious or catastrophe | Rich Proulx |
| 27 May 2019 | 31A | Prefix with friendly | Bruce Haight |
| 28 Apr 2019 | 6D | Prefix with toxicology | Brendan Emmett Quigley |
| 21 Apr 2019 | 68D | Prefix with terrorism | Grant Thackray |
| 15 Apr 2019 | 27D | Green: Prefix | Patrick Blindauer and Samuel A. Donaldson |
| 5 Apr 2019 | 46A | Prefix with car or conscious | Ryan McCarty |
| 21 Feb 2019 | 45A | Lead-in to -cide | Sam Trabucco |
| 7 Feb 2019 | 2D | Writer Umberto ___ | Morton J. Mendelson |
| 21 Jan 2019 | 53A | Prefix with friendly | Sean Biggins |
| 17 Jan 2019 | 5D | Green prefix | Ross Trudeau |
| 3 Dec 2018 | 63D | Environment-related prefix | Lynn Lempel |
| 17 Nov 2018 | 42A | “Baudolino” novelist | Doug Peterson and Erik Agard |
| 6 Oct 2018 | 29D | Lead-in to tourism or terrorism | Lewis Dean Hyatt |
| 2 Sep 2018 | 20A | “Foucault’s Pendulum” author, 1988 | Tom McCoy |
| 30 Jul 2018 | 24A | ___-friendly (green) | Gary Cee |
| 23 May 2018 | 12D | Prefix with warrior | David Steinberg |
| 6 May 2018 | 65A | Prefix with warrior | Brendan Emmett Quigley |
| 3 May 2018 | 36D | Start to terrorism or tourism | Emily Carroll |
| 26 Apr 2018 | 37A | Prefix with law or label | Alex Eaton-Salners |
| 24 Apr 2018 | 8D | Green: Prefix | Peter Gordon |
| 28 Feb 2018 | 11A | Modern prefix with warrior | Peter A. Collins |
| 9 Feb 2018 | 56D | Pro-sustainability, in lingo | Brendan Emmett Quigley |
| 29 Dec 2017 | 19A | ___-conscious | David Steinberg |
| 26 Dec 2017 | 32A | ___-friendly | Peter Gordon |
| 2 Oct 2017 | 35D | Prefix with conscious or freak | Trenton Charlson |
| 3 Sep 2017 | 36D | Prefix with system | Andrew Zhou |
| 21 Aug 2017 | 45D | ___-friendly | Tom McCoy |
| 8 Aug 2017 | 56A | Green: Prefix | Dan Flanagan |
| 18 Jul 2017 | 22A | Prefix with tourism | Michael Hawkins |
| 6 Jun 2017 | 47A | ___-friendly | Lisa Loeb and Doug Peterson |
| 2 May 2017 | 6D | Prefix with tourism | David J. Kahn |
| 28 Jan 2017 | 29A | Friendly introduction? | Damon Gulczynski |
| 26 Jan 2017 | 49A | “The Name of the Rose” author | Hal Moore |
| 25 Jan 2017 | 41A | Prefix with freak or friendly | Tracy Gray |
| 5 Jan 2017 | 9D | Prefix with conscious | Ed Sessa |
| 19 Dec 2016 | 43A | Environmentalist’s prefix | Jason Mueller |
| 22 Oct 2016 | 25D | Prefix with village | James Mulhern |
| 7 Sep 2016 | 7D | Prefix with chic | Kary Haddad |
| 13 Jul 2016 | 38D | Author Umberto | Tom McCoy |
| 7 Jul 2016 | 5A | Prefix with aware or catastrophe | Joel Elkins and Andrea Carla Michaels |
| 27 Jun 2016 | 16A | Environmental prefix | Kevan Choset |
| 5 Jun 2016 | 111D | “The Name of the Rose” novelist | Tom McCoy |
| 17 Apr 2016 | 100A | Prefix meaning 118-Across | Howard Barkin |
| 13 Mar 2016 | 47D | Prefix with tourism | Tom McCoy |
| 2 Mar 2016 | 24A | ___-Drive, popular light-powered watch | Fred Piscop |
| 15 Feb 2016 | 42A | Earth-friendly prefix | David J. Kahn |
| 24 Jan 2016 | 12D | Prefix with terrorism or tourism | Francis Heaney and Brendan Emmett Quigley |
| 19 Jan 2016 | 54A | Umberto ___, author of “The Name of the Rose” | Byron Walden |
| 16 Jan 2016 | 39A | Prefix with design | Sean Dobbin |
| 24 Dec 2015 | 36D | Prefix with system | Derek Bowman |
| 27 Jul 2015 | 2D | ___-friendly (green) | D. Scott Nichols and Zhouqin Burnikel |
| 15 Jun 2015 | 36D | Environmental prefix | Mike Buckley |
| 14 Jun 2015 | 44A | System starter? | Randolph Ross |
| 5 Apr 2015 | 121A | Prefix with system | Tom McCoy |
| 25 Mar 2015 | 22A | Modern prefix with design | Jacob Stulberg |
| 4 Feb 2015 | 41A | “The Prague Cemetery” author, 2010 | Julian Lim |
| 10 Dec 2014 | 40A | Modern prefix with warrior | Tom McCoy |
| 12 Nov 2014 | 55A | Car starter? | Daniel Landman |
| 16 Oct 2014 | 10D | “The Island of the Day Before” novelist | John Farmer |
| 11 Oct 2014 | 27A | Green piece? | Evans Clinchy |
| 5 Sep 2014 | 6D | Friendly start? | Joe Krozel |
| 3 Sep 2014 | 6D | “The Name of the Rose” author | Peter A. Collins |
| 14 Jul 2014 | 11D | Prefix with friendly | MaryEllen Uthlaut |
| 29 Jun 2014 | 118D | Green: Prefix | Byron Walden |
| 28 Jun 2014 | 45D | Prefix with efficiency | Josh Knapp |
| 6 Jun 2014 | 59D | Green start? | Kameron Austin Collins |
| 5 May 2014 | 71A | Earth-friendly prefix | Lynn Lempel |
| 21 Apr 2014 | 33D | “Foucault’s Pendulum” author Umberto | John Lieb |
| 16 Apr 2014 | 48A | Author Umberto | Michael Dewey |
| 26 Mar 2014 | 1A | “Foucault’s Pendulum” author | Alex Vratsanos |
| 9 Feb 2014 | 94A | Author Umberto | Charles M. Deber |
| 2 Feb 2014 | 55D | System prefix | Dick Shlakman and Jeff Chen |
| 7 Nov 2013 | 39A | Author of “The Prague Cemetery” | Alan DerKazarian |
| 19 Oct 2013 | 11D | Prefix with tourism | Peter Wentz |
| 21 Jun 2013 | 5D | Prefix with sphere | Michael Sharp |
| 30 Mar 2013 | 19A | Prefix with car | Gareth Bain |
| 19 Mar 2013 | 46D | Earth Day prefix | Mike Buckley |
| 13 Feb 2013 | 33D | “The Name of the Rose” author | Richard and Judith Martin |
| 22 Jan 2013 | 62D | Prefix with friendly | Jay Kaskel |
| 22 Sep 2012 | 39A | Prefix with consumer | Kristian House |
| 29 Apr 2012 | 73D | Prefix with resort | Tracy Gray |
| 25 Apr 2012 | 27A | Green prefix | Peter Wentz |
| 1 Apr 2012 | 29D | Prefix with management | Patrick Merrell |
| 19 Feb 2012 | 89A | Writer Umberto | James F. C. Burns |
| 5 Feb 2012 | 116D | Environmental prefix | Charles M. Deber |
| 11 Nov 2011 | 54D | Prefix with car | Alex Vratsanos |
| 26 Oct 2011 | 36D | Friendly introduction? | Milo Beckman |
| 24 Sep 2011 | 11D | Conscious beginning? | Jeremy Horwitz |
| 20 Sep 2011 | 18D | Prefix with friendly | Daniel Raymon |
| 8 Jul 2011 | 47A | Prefix with sensitive | Brendan Emmett Quigley |
| 2 Jun 2011 | 57D | Prefix with warrior | Brendan Emmett Quigley |
| 24 May 2011 | 34D | Environmental prefix | Michael Blake and Andrea Carla Michaels |
| 1 Apr 2011 | 33A | Green: Prefix | Elizabeth A. Long |
| 17 Mar 2011 | 50A | Green: Prefix | Anna Shechtman |
| 9 Feb 2011 | 15A | Writer Umberto | Victor Barocas |
| 1 Feb 2011 | 18D | “Green” prefix | Ron and Nancy Byron |
| 12 Jan 2011 | 5D | Prefix with system | Jim Hilger |
| 9 Jan 2011 | 100D | Sphere or system starter | Patrick Berry |
| 24 Nov 2010 | 49D | Prefix with hazard | Allan E. Parrish |
| 24 Oct 2010 | 83D | Prefix with warrior | Brendan Emmett Quigley |
| 4 Sep 2010 | 9D | Friendly intro? | Mark Diehl |
| 16 Aug 2010 | 9D | Environmental prefix | Andrea Carla Michaels and Jennifer Nutt |
| 1 Aug 2010 | 101A | Prefix with tour | Brendan Emmett Quigley |
| 29 Jul 2010 | 57A | “Baudolino” novelist | Peter A. Collins |
| 11 Jul 2010 | 98A | Author Umberto | Ed Sessa |
| 23 Jun 2010 | 29D | Prefix with -cide | Alex Boisvert |
| 21 Jun 2010 | 54D | ___-friendly (green) | Fred Piscop |
| 5 Apr 2010 | 41A | Environmentalist’s prefix | Nancy Salomon |
| 30 Mar 2010 | 48D | Prefix with friendly | Elizabeth C. Gorski |
| 11 Mar 2010 | 10D | Modern prefix with balance | John Farmer |
| 24 Aug 2009 | 38A | Umberto ___, author of “The Name of the Rose” | Anthony J. Salvia |
| 11 Jun 2009 | 26A | Trendy prefix | Alex Boisvert |
| 3 May 2009 | 90A | Friendly opening? | Caleb Madison |
| 5 Apr 2009 | 31A | Green: Prefix | Charles Deber |
| 31 Mar 2009 | 45A | Prefix with tourism | Allan E. Parrish |
| 9 Mar 2009 | 64A | Prefix with tourism | Betty Keller |
| 27 Jan 2009 | 6D | Prefix with system or sphere | Jim Hyres |
| 21 Jan 2009 | 44A | Author of “The Island of the Day Before” | Fred Piscop |
| 18 Jan 2009 | 108A | Prefix with warrior | Randolph Ross |
| 26 Oct 2008 | 116D | “Baudolino” author | Daniel C. Bryant |
| 8 Oct 2008 | 38D | Prefix with tourist | Peter A. Collins |
| 1 Oct 2008 | 36D | Prefix with tourism | Barry Boone |
| 21 Sep 2008 | 112D | Prefix with freak | Brendan Emmett Quigley |
| 27 Aug 2008 | 3D | System starter? | Donna Hoke Kahwaty |
| 21 Aug 2008 | 62D | Prefix with -cide | Gary J. Whitehead |
| 20 Aug 2008 | 8D | Writer Umberto | Allan E. Parrish |
| 5 Jul 2008 | 55D | Prefix with tour | Karen M. Tracey |
| 5 Feb 2008 | 45A | Umberto who wrote “The Name of the Rose” | Peter A. Collins |
| 14 Dec 2007 | 43A | “Baudolino” novelist | Manny Nosowsky |
| 25 Oct 2007 | 58A | Green: Prefix | Susan Harrington Smith |
| 21 Oct 2007 | 63A | Modern prefix with village | Brendan Emmett Quigley |
| 12 Sep 2007 | 13D | “Foucault’s Pendulum” author | Alan Arbesfeld |
| 16 Aug 2007 | 23A | Prefix with warrior | Alan Arbesfeld |
| 15 Jul 2007 | 4D | Prefix with -cide | Patrick Berry |
| 7 May 2007 | 38A | “Foucault’s Pendulum” author | Janet Bender |
| 26 Mar 2007 | 11D | Modern prefix with tourism | Eric Fischer |
| 25 Feb 2007 | 48A | “Baudolino” novelist | David J. Kahn |
| 22 Feb 2007 | 24A | Prefix with -cide | Mike Nothnagel |
| 3 Jan 2007 | 57D | Green prefix | Kim Seidl |
| 12 Nov 2006 | 57A | “Foucault’s Pendulum” author | Patrick Berry |
| 8 Nov 2006 | 22D | Green: Prefix | Lee Glickstein and Nancy Salomon |
| 7 Nov 2006 | 37A | Prefix with friendly | Bruce P. Douglas |
| 16 Sep 2006 | 8D | Prefix with tourism | Michael Shteyman |
| 27 Aug 2006 | 13D | Prefix with system | Seth A. Abel |
| 12 Jul 2006 | 56A | Prefix with friendly | Richard Chisholm |
| 9 Jul 2006 | 30A | Prefix with friendly | Patrick Berry |
| 2 Jul 2006 | 54D | Green: Prefix | Elizabeth C. Gorski |
| 30 Apr 2006 | 93A | Prefix with friendly | Elizabeth C. Gorski |
| 23 Apr 2006 | 25D | System start-up? | Joe DiPietro |
| 11 Apr 2006 | 43A | Author Umberto | Lee Glickstein and Nancy Salomon |
| 19 Mar 2006 | 27D | Green: Prefix | Michael Shteyman |
| 12 Mar 2006 | 109A | Prefix with system | Daniel C. Bryant |
| 12 Feb 2006 | 6D | “Baudolino” author | Manny Nosowsky |
| 16 Nov 2005 | 61D | Prefix with friendly | Philip Thomson |
| 22 Jul 2005 | 29D | Friendly opener? | Elizabeth C. Gorski |
| 17 Jul 2005 | 8D | “Baudolino” author | David J. Kahn |
| 12 Jul 2005 | 66D | System starter? | Nancy Salomon |
| 10 Mar 2005 | 45A | Prefix with conscious | Ed Early |
| 24 Feb 2005 | 15D | Prefix with system | Patrick Merrell |
| 28 Dec 2004 | 38A | Author Umberto | Elizabeth C. Gorski |
| 25 Nov 2004 | 3D | Prefix with friendly | Nancy Salomon and Earl W. Reed |
| 21 Oct 2004 | 7D | Prefix with conscious | Harvey Estes |
| 14 Sep 2004 | 14A | “The Name of the Rose” writer | Nancy Salomon and Harvey Estes |
| 6 Sep 2004 | 10D | Environmental prefix | Michael Shteyman |
| 22 Aug 2004 | 76D | Prefix with tourism | Cathy Millhauser |
| 11 Apr 2004 | 24D | Green: Prefix | Patrick Merrell |
| 11 Feb 2004 | 33A | ___-friendly | Ethan Friedman |
| 4 Feb 2004 | 2D | Author Umberto | Roy Leban |
| 19 Oct 2003 | 52D | “Foucault’s Pendulum” author | Nancy Nicholson Joline |
| 27 Jul 2003 | 86D | “The Island of the Day Before” writer | Michael Grudzielanek |
| 15 Jul 2003 | 26D | Prefix with management | Harvey Estes |
| 25 Jun 2003 | 35D | “Foucault’s Pendulum” author | Leonard Williams |
| 13 Jun 2003 | 5D | Prefix with tourism | Todd McClary |
| 6 May 2003 | 11D | Environmental prefix | Karen M. Tracey |
| 26 Apr 2003 | 36A | System start-up? | Patrick Merrell |
| 25 Mar 2003 | 31A | Novelist Umberto | John Greenman |
| 23 Feb 2003 | 18D | Prefix with logical | Nancy Salomon |
| 9 Nov 2002 | 8D | “Baudolino” novelist, 2002 | James E. Buell |
| 27 Oct 2002 | 85A | Prefix with catastrophe | Nancy Nicholson Joline |
| 30 Sep 2002 | 36A | Environmentalist’s prefix | Harvey Estes and Nancy Salomon |
| 25 Sep 2002 | 14A | Author Umberto | Tyler Hinman |
| 17 Aug 2002 | 28D | Prefix with sphere | Frank Longo |
| 9 Jul 2002 | 24D | Prefix with system | Robert Malinow |
| 14 Apr 2002 | 37A | Prefix with sphere | David J. Kahn |
| 23 Jan 2002 | 25A | Prefix with terrorism | Alan Arbesfeld |
| 6 Jan 2002 | 88A | “A Theory of Semiotics” author | Frank A. Longo |
| 29 Jul 2001 | 6D | Prefix with terrorism | Michael Ashley |
| 11 Apr 2001 | 15D | “The Name of the Rose” author | Brendan Emmett Quigley |
| 28 Jan 2001 | 61A | Prefix with friendly | Jim Page |
| 30 Jul 2000 | 107D | Prefix with -cide | Randolph Ross |
| 23 Jul 2000 | 105A | “Foucault’s Pendulum” author | Patrick Berry |
| 2 Jul 2000 | 109D | Author of “Il nome della rosa” | Nancy Nicholson Joline |
| 25 Jun 2000 | 43A | System starter | Cathy Millhauser |
| 9 Jun 2000 | 46D | Friendly introduction? | Joe DiPietro |
| 21 May 2000 | 89A | Prefix with sphere | Matt Gaffney |
| 11 Apr 2000 | 43D | Prefix with friendly | Nancy Salomon and Sherry O. Blackard |
| 21 Feb 2000 | 21D | Prefix with system or sphere | Randy Sowell |
| 29 Dec 1999 | 54A | Logical intro? | Robert O. Dillman |
| 10 Dec 1999 | 34D | System starter | Gilbert H. Ludwig |
| 17 Nov 1999 | 39D | Environmental prefix | Fred Piscop |
| 3 Oct 1999 | 55D | Prefix with system | Fred Piscop |
| 26 Sep 1999 | 91A | System starter | Randolph Ross |
| 3 Aug 1999 | 56D | Author Umberto | Dave Tuller |
| 18 Jul 1999 | 60D | Prefix with friendly | Nancy Nicholson Joline |
| 10 Jul 1999 | 38D | Prefix with climate | Rich Norris |
| 1 Jul 1999 | 23A | “The Name of the Rose” writer | Alan Arbesfeld |
| 11 Apr 1999 | 10D | Prefix with hazard | Matt Gaffney |
| 13 Mar 1999 | 26A | Modern prefix with friendly | David J. Kahn |
| 4 Mar 1999 | 34D | Popular 90’s essayist | Cathy Millhauser |
| 28 Feb 1999 | 108D | Prefix with terrorist | Dave Tuller |
| 10 Jan 1999 | 96A | Green | David J. Kahn |
| 29 Nov 1998 | 27A | Prefix with sphere | Matt Gaffney |
| 21 Oct 1998 | 32A | Green’s prefix | Matt Gaffney |
| 22 Jul 1998 | 22D | Author Umberto | Mark Elliot Skolsky |
| 10 Jul 1998 | 8D | Prefix with -cide | Brendan Emmett Quigley |
| 28 Jun 1998 | 121D | Nonpolluting | Fred Piscop |
| 21 Jun 1998 | 70A | “Foucault’s Pendulum” author | Jim Page |
| 15 Jun 1998 | 5D | Environmentalist’s prefix | Nancy Salomon |
| 31 May 1998 | 59A | Prefix with sphere or system | Cathy Millhauser |
| 7 Apr 1998 | 57D | Earth-friendly prefix | Randy Sowell |
| 9 Dec 1997 | 45A | Prefix with sphere or disaster | Fran and Lou Sabin |
| 30 Oct 1997 | 35A | Prefix with system | Cathy Millhauser |
| 21 Sep 1997 | 110D | “The Island of the Day Before” author | Mike Shenk |
| 9 Aug 1997 | 25A | Prefix with -cide | Raymond Hamel |
| 19 Mar 1997 | 54D | “The Island of the Day Before” author | Trip Payne |
| 23 Feb 1997 | 76A | Prefix with sphere | Nancy Nicholson Joline |
| 7 Feb 1997 | 4D | “Green”: Prefix | R. Norris |
| 15 Jan 1997 | 58A | “The Island of the Day Before” author | C. Currier |
| 15 Dec 1996 | 91A | Author of “The Island of the Day Before” | R. Ross |
| 14 Aug 1996 | 23A | Author Umberto | G. E. Sykes |
| 2 Aug 1996 | 62D | William of Baskerville’s creator | J. Herrington |
| 30 Jul 1996 | 19D | Environmental prefix | E. Gorski |
| 31 Jan 1996 | 41A | “The Island of the Day Before” novelist | M. Gaffney |
| 25 Dec 1995 | 33A | Author Umberto | Sidney L. Robbins |
| 26 Oct 1995 | 12D | “The Name of the Rose” author | Jim Page |
| 24 Oct 1995 | 66D | Author Umberto | Stephanie Spadaccini |
| 15 Sep 1995 | 59D | Italian novelist | Matt Gaffney |
| 25 Jun 1995 | 24D | “Apocalypse Postponed” essayist | Frances Hansen |
| 4 Jun 1995 | 123A | “Foucault’s Pendulum” penman | Bryant White |
| 12 May 1995 | 22A | “Travels in Hyperreality” writer | Rich Norris |
| 23 Apr 1995 | 37A | Prefix with system | Randolph Ross |
| 17 Mar 1995 | 59D | Environmentally minded | Randolph Ross |
| 28 Feb 1995 | 29A | “Foucault’s Pendulum” author | Nancy S. Ross |
| 2 Feb 1995 | 70A | System start-up | Bob and Sharon Klahn |
| 14 Jan 1995 | 10D | “Foucault’s Pendulum” author | Rich Norris |
| 27 Nov 1994 | 39A | Environmentally concerned | Jacques Liwer |
| 18 Oct 1994 | 33D | Logical beginning | Harvey Estes |
| 29 Jul 1994 | 60D | Prefix with system or sphere | A. D. Cover |
| 7 Jun 1994 | 37A | Environmentally minded, for short | Ernie Furtado |
| 2 Jun 1994 | 49A | Sphere opening | Harvey Estes |
| 30 May 1994 | 31D | Author Umberto | Raymond Hamel |
| 30 Mar 1994 | 55D | Umberto of Italy | Eileen Lexau |
| 17 Mar 1994 | 16A | “Foucault’s Pendulum” novelist | Jim Page |
| 26 Feb 1994 | 6D | “Travels in Hyperreality” author | Bob Klahn |
| 9 Jan 1994 | 12D | “Foucault’s Pendulum” author | Mel Rosen |
Here you get ECO answered all clues with dates, Grid, and Author info. If ECO will be used in a new NYT Crossword, that will be updated here.