“Earth first! (we’ll log the other planets later)”

The radical environmental advocacy group Earth First! formed in 1980. A popular anti-Earth First! bumper sticker is, “Earth First! (we’ll log/mine/strip mine the other planets later).”
 
A T-shirt with “Earth First!” on the front and “We’ll Log the Other Planets Later” on the back has been cited in print since at least September 1993. Early citations for the saying appear to be in newspapers from the Pacific Northwest (Alaska, California and Washington).
 
   
Wikipedia: Earth First!
Earth First! is a radical environmental advocacy group that emerged in the Southwestern United States in 1979. It was co-founded on April 4th, 1980 by Dave Foreman, Mike Roselle, Howie Wolke, and less directly, Bart Koehler and Ron Kezar.
 
There are Earth First! groups in the United States, United Kingdom, Canada, Australia, Netherlands, Belgium, Philippines, Czech Republic, India, Mexico, France, Germany, New Zealand, Poland, Nigeria, Slovakia, Ireland, Italy, and Spain.
     
Google News Archive
13 September 1993, The Spokesman-Review (Spokane, WA), “Huckleberries” by D. F. Oliveria, pg. A10, col. 4:
Timely Signs: Popular T-shirts in Grangeville and Elk City these days are the ones proclaiming “Earth First!” on the front. And on the back? “We’ll Log the Other Planets Later.”
 
27 March 1994, Anchorage (AK) Daily News, “Alaska Ear,” pg. A2:
Stuck in the window of Robin Taylor’s Senate office: “Earth First! We’ll log the other planets later.”
   
26 May 1994, Sacramento (CA) Bee, “Amid Elko mine boom, rich vein of discontent,” pg. A1:
One reads: “Earth First! We’ll Mine the Other Planets Later.”
 
Google Books
Facing the Lion
By Kurt Brown
Boston, MA: Beacon Press
1996
Pg. 134:
Just compare bumper stickers. Ours say, “Stumps Don’t Lie” or “Love Your Mother.” Theirs say, “Earth First! (We’ll Log the Other Planets Later).”
 
11 August 1996, Palm Beach (FL) Post, “Gotta love a good, cheesy Republican convention” by Frank Cerabino, pg. 1A:
Or a T-shirt that says, “Earth First? OK, we’ll mine and log the other planets later.”
   
Google Books
September -October 1996, Mother Jones magazine, pg. 56, col. 1:
She (Helen Chenoweth, a Republican Congresswoman from Idaho—ed.) also grabbed attention for her T-shirt that read “Earth First!” on the front and “We’ll log the other planets later” on the back.
 
OCLC WorldCat record
Real American
Publisher: Redway, CA : Churn It Up Records, [2004].
Edition/Format:  Music CD : CD audio : Popular music : English
Contents:
Earth first! (we’ll log the other planets later)