                 FOR PUBLICATION
 UNITED STATES COURT OF APPEALS
      FOR THE NINTH CIRCUIT

CENTER FOR FOOD SAFETY; ORGANIC       
SEED ALLIANCE; SIERRA CLUB; HIGH
MOWING ORGANIC SEEDS,
              Plaintiffs-Appellees,
                v.
THOMAS J. VILSACK,                           No. 10-17719
                        Defendant,            D.C. No.
               and                        3:10-cv-04038-JSW
MONSANTO COMPANY; AMERICAN
CRYSTAL SUGAR COMPANY;
SYNGENTA SEEDS, INC.; BETASEED,
INC.,
 Intervenor-Defendants-Appellants.
                                      

CENTER FOR FOOD SAFETY; ORGANIC       
SEED ALLIANCE; SIERRA CLUB; HIGH
MOWING ORGANIC SEEDS,
              Plaintiffs-Appellees,
                v.
                                             No. 10-17722
THOMAS J. VILSACK,
             Defendant-Appellant,             D.C. No.
                                          3:10-cv-04038-JSW
               and
                                               OPINION
MONSANTO COMPANY; AMERICAN
CRYSTAL SUGAR COMPANY;
SYNGENTA SEEDS, INC.; BETASEED,
INC.,
           Intervenor-Defendants.
                                      

                           3099
3100           CENTER FOR FOOD SAFETY v. VILSACK
         Appeal from the United States District Court
            for the Northern District of California
          Jeffrey S. White, District Judge, Presiding

                   Argued and Submitted
        February 15, 2011—San Francisco, California

                     Filed February 25, 2011

    Before: Mary M. Schroeder and Sidney R. Thomas,
   Circuit Judges, and Mark W. Bennett, District Judge.*

                   Opinion by Judge Thomas




  *The Honorable Mark W. Bennett, District Judge for the U.S. District
Court for Northern Iowa, Sioux City, sitting by designation.
              CENTER FOR FOOD SAFETY v. VILSACK            3103
                         COUNSEL

Robert J. Lundman, Department of Justice, Washington, D.C.,
for the federal defendants-appellants.

Richard P. Press, Latham & Watkins, L.L.P., Washington,
D.C., for the intervenor defendants-appellants.

Paul H. Achitoff, Earthjustice, Honolulu, Hawaii, for the
plaintiffs-appellees.


                          OPINION

THOMAS, Circuit Judge:

   The Department of Agriculture’s Animal and Plant Health
Inspection Service (“APHIS”) and Intervenors Monsanto et
al. appeal the district court’s decision granting a preliminary
injunction that mandates the destruction of juvenile Roundup
Ready sugar beets planted pursuant to permits issued by the
agency. Because the plaintiffs have failed to demonstrate
irreparable harm, we reverse and vacate the preliminary
injunction and direct that the permits be given full force and
effect.

                               I

   Olivier de Serres, the father of French agriculture,
exclaimed in 1600 of the sugar beet that “this choice food
yields a juice like sugar syrup when cooked.” More than a
century later, the German scientist Andreas Marggraf demon-
strated that the sweet-tasting crystals obtained from beet juice
were the same as those from sugar cane. Necessity being the
mother of invention, it took a trade blockade in the Napole-
onic era to accelerate the production of sugar from beets.
3104            CENTER FOR FOOD SAFETY v. VILSACK
   At present, the United States meets the considerable
demand for domestic refined sugar by producing refined sugar
from domestic sugar beets, refining raw cane sugar produced
by domestic and foreign sugarcane producers, and importing
refined cane sugar. About 44% of the domestic refined sugar
supply comes from sugar beets. The contribution of the sugar
beet to the national agricultural economy is, to say the least,
considerable.

   The sugar beet is a biennial crop which develops a sugar-
rich tap root in the first year (the vegetative stage) and a flow-
ering seed stalk in the second year (the reproductive stage).
Early in its development, it is known as a “steckling,” i.e. a
small, juvenile seedling that has grown neither a root nor
seeds. When the beet matures, its root is harvested and pro-
cessed into sugar; the pulp is used for food. Sugar beets
grown for their root crop are grown only through the vegeta-
tive stage, maximizing their sugar content.1

   If allowed to reach the reproductive stage, a sugar beet uses
the stored sugar to grow a seed stalk, a process known as
“bolting.” Sugar beets are largely wind pollinated, though
their pollen may also be dispersed by insects, and they are
sexually compatible with certain other beet (beta vulgaris)
crops, such as table beets and Swiss chard.

   Weeds significantly reduce sugar beet yields and constitute
a serious problem for farmers. Farmers often use herbicides,
including “Roundup” products, to stop weeds from germinat-
ing.
  1
    The production of refined sugar from sugar beets follows a four-year
cycle. For example, the commercial seed crop planted in fall 2010 would
be harvested for commercial seed in fall 2011, processed in winter
2011-2012, and planted in spring 2012 for sugar beet (root) production. In
fall 2012, the beet crop would be harvested, processed, and become the
refined sugar supply in 2013.
              CENTER FOR FOOD SAFETY v. VILSACK            3105
   In 1988, Monsanto and KWS SAAT AG (“KWS”), the par-
ent company of Betaseed, developed Roundup Ready sugar
beets, which are genetically engineered to tolerate glyphosate,
the active ingredient in “Roundup” herbicides. Monsanto
owns the intellectual property in the gene for glyphosate toler-
ance; KWS inserted that gene into sugar beets. Together, they
developed a particular variety of Roundup Ready sugar beet,
called “event H7-1,” by transforming a KWS proprietary line
of sugar beets. With the Roundup Ready sugar beet’s
glyphosate-tolerant trait, farmers can treat their fields with
Roundup products to eliminate weeds without harming the
(resistant) sugar beets. The sugar produced from Roundup
Ready sugar beets is identical to sugar processed from con-
ventional sugar beets, and has been approved for food safety
in the United States and the European Union.

                               II

   The development of Roundup Ready sugar beets is subject
to federal regulation. Congress passed the Plant Protection
Act, 7 U.S.C. § 7701 et seq., to protect the agriculture, envi-
ronment, and economy of the United States from “plant pests
or noxious weeds.” Id. § 7701(1); see also Monsanto v. Geert-
son Seed Farms, ___ U.S. __, 130 S. Ct. 2743, 2750 (2010)
(describing regulatory scheme). The Act provides that the
Secretary of the Department of Agriculture may issue regula-
tions “to prevent the introduction of plant pests into the
United States or the dissemination of plant pests within the
United States,” id. § 7711(a), and the Secretary has delegated
that authority to APHIS, 7 C.F.R. §§ 2.22(a), 2.80(a)(36).
APHIS regulates the “introduction”—i.e., the importation,
interstate movement, or release into the environment—of “or-
ganisms and products altered or produced through genetic
engineering that are plant pests or are believed to be plant
pests,” referred to as “regulated articles.” Id. §§ 340.0 (a)(2)
& n.1, 340.1 (“Part 340”).

   Roundup Ready sugar beets were originally “regulated arti-
cles” under the Plant Protection Act and accompanying regu-
3106           CENTER FOR FOOD SAFETY v. VILSACK
lations because they were genetically engineered with a gene
sequence from a donor organism that is a plant pest. As regu-
lated articles, they could lawfully be planted outdoors (as a
confined field release) or moved interstate only if authorized
by an APHIS notification or permit. See Id. §§ 340.0(a), 340.3
(notification), 340.4 (permits). In addition, any person could
petition the agency to deregulate Roundup Ready sugar beets,
in whole or in part. Id. § 340.6.

   In deciding whether to issue Part 340 permits or to deregu-
late a genetically engineered plant variety, APHIS must also
comply with the National Environmental Policy Act
(“NEPA”), 42 U.S.C. § 4321 et seq. See Monsanto, 130 S. Ct.
at 2750. NEPA requires an agency to prepare an environmen-
tal impact statement (“EIS”) for “major Federal actions signif-
icantly affecting the quality of the human environment.” 42
U.S.C. § 4332(2)(C). An agency need not prepare an EIS for
a particular proposal if it finds, on the basis of a shorter “envi-
ronmental assessment” (“EA”), that the action will not have
a significant impact on the environment. 40 C.F.R.
§§ 1508.9(a), 1508.13. Additionally, agencies may identify
classes of actions that normally do not require the preparation
of either an EIS or an EA, called “categorical exclusions.” Id.
§ 1507.3(b)(2). Categorical exclusions are “categor[ies] of
actions which do not individually or cumulatively have a sig-
nificant effect on the human environment.” Id. § 1508.4.

   APHIS has established a categorical exclusion for
“[p]ermitting, or acknowledgment of notifications for, con-
fined field releases of genetically engineered organisms and
products.” 7 C.F.R. § 372.5(c)(3)(ii).

                                III

   The narrow question presented by this appeal is whether
the district court abused its discretion by ordering the destruc-
tion of certain permitted juvenile Roundup Ready sugar beet
plants. However, the dispute has arisen in a broader context.
                CENTER FOR FOOD SAFETY v. VILSACK                    3107
   The litigation between Plaintiffs, APHIS, and Intervenors
concerns the regulation, deregulation, and permitting of
Roundup Ready sugar beets. The parties’ disputes center on
three groups of APHIS decisions: (1) the agency’s March
2005 complete deregulation of Roundup Ready sugar beets;
(2) its August 2010 issuance of permits authorizing the plant-
ing of Roundup Ready sugar beet stecklings in select, remote
areas; and (3) recently-finalized February 2011 interim
actions to partially deregulate Roundup Ready sugar beets.
The present action concerns the permits issued in August
2010.

   The March 2005 complete deregulation and February 2011
partial deregulation decisions are not before us. In the litiga-
tion known as Sugar Beets I,2 the district court vacated
APHIS’s March 2005 complete deregulation decision, after
ruling that the agency violated NEPA by failing to prepare an
Environmental Impact Statement (“EIS”).3 APHIS is currently
preparing an EIS in advance of any new decision to fully
deregulate Roundup Ready sugar beets, and we do not address
  2
     “Sugar Beets I” refers to Plaintiffs’ challenge to APHIS’s March 2005
decision to completely deregulate Roundup Ready sugar beets, and “Sugar
Beets II” refers to Plaintiffs’ separate challenge to the August 2010 issu-
ance of the steckling permits.
   3
     APHIS initially classified Roundup Ready sugar beets as “regulated
articles.” In November 2003, Monsanto and KWS petitioned APHIS to
deregulate Roundup Ready sugar beets—that is, they sought a determina-
tion that event H7-1 and its progeny would not present a plant pest risk
and, therefore, would no longer be a “regulated article” under Part 340. In
response, the agency published an EA in February 2005, which made a
finding of no significant impact (“FONSI”) on the human environment
from the “unconfined agricultural use of event H7-1.” APHIS thus con-
cluded that an EIS was not required, and in March 2005, the agency
unconditionally deregulated Roundup Ready sugar beets. Monsanto/KSW
Roundup Ready sugar beets were no longer considered regulated articles
under Part 340. Plaintiffs challenged complete deregulation in Sugar Beets
I, and the district court vacated APHIS’s deregulation decision, remanded
to the agency to prepare an EIS, and denied Plaintiffs’ motion for a perma-
nent injunction.
3108            CENTER FOR FOOD SAFETY v. VILSACK
any aspect of the Sugar Beets I decision here.4 Nor do we
review APHIS’s actions announced during the pendency of
this appeal, regarding partial deregulation while it prepares
the EIS for complete deregulation.5

   In Sugar Beets II, the district court issued a preliminary
injunction in favor of Plaintiffs, requiring the destruction of
juvenile sugar beet “stecklings” planted by Intervenors under
permits issued by APHIS in September 2010. APHIS issued
these Part 340 permits to four seed companies—Intervenors
American Crystal Sugar Co., Betaseed, and Syngenta, as well
as non-party SES vanderHave USA—which had applied for
permission to plant Roundup Ready sugar beet seed in order
to grow stecklings. The permits authorize steckling growth on
limited acreage in defined geographic locations (in Oregon
and Arizona), and include conditions prohibiting flowering or
pollination before the permits expire on February 28, 2011.
With each permit, APHIS issued NEPA “Decision Work-
sheets” explaining that limited steckling growth would have
no significant environmental impacts.
  4
     This consolidated appeal, however, does include Intervenors’ claim
that the Sugar Beets I court improperly denied its motion to intervene at
the merits phase. We will address Intervenors’ appeal (No. 10-17335) in
a separate decision.
   5
     As Sugar Beets II and this appeal progressed, APHIS has undertaken
further interim actions to partially deregulate Roundup Ready sugar beets.
In October 2010, the agency published notice that Monsanto and KWS
had filed a supplemental petition requesting partial deregulation, 75 Fed.
Reg. 62,365, and pursuant to that petition, on November 4, 2010, APHIS
released for public comment a draft interim EA, 75 Fed. Reg. 67,945.
APHIS announced the final EA/FONSI on February 4, 2011, which
addresses the agency’s decisions to undertake two interim actions: (1) lim-
ited permitting for the Roundup Ready sugar beet seed crop and (2) a con-
ditional, partial deregulation of the Roundup Ready sugar beet root crop.
The interim actions, as well as the EA/FONSI, took effect on February 8,
2011, by notice published at 76 Fed. Reg. 6,759. Both interim actions will
expire no later than December 31, 2012, or earlier in 2012 if APHIS com-
pletes its EIS of full deregulation.
                 CENTER FOR FOOD SAFETY v. VILSACK                     3109
   Less than a week after the permits issued, Plaintiffs filed
the present suit, Sugar Beets II, and sought a temporary
restraining order and a preliminary injunction. In late Septem-
ber 2010, the district court concluded that Plaintiffs were
likely to prevail on their NEPA claims. In early November
2010, the court held a three-day evidentiary hearing on reme-
dies. At the end of the month, the court issued a preliminary
injunction and ordered the destruction of the stecklings. We
stayed the injunction pending appeal until February 28, 2011.

                                    IV

   [1] To obtain injunctive relief, Plaintiffs must show them-
selves to be “under threat of suffering ‘injury in fact’ that is
concrete and particularized; the threat must be actual and
imminent, not conjectural or hypothetical; it must be fairly
traceable to the challenged action of the defendant; and it
must be likely that a favorable judicial decision will prevent
or redress the injury.” Summers v. Earth Island Inst., 129 S.
Ct. 1142, 1149 (2009).

   [2] In challenging the steckling permits, Plaintiffs claim
that APHIS violated NEPA by “artificially carving up” the
stages of Roundup Ready sugar beet planting and production,
rather than performing a single analysis of the crop’s impacts
as NEPA requires. They assert standing on the basis of a
NEPA procedural injury that threatens the concrete interests
of their members, who include organic farmers and consum-
ers. To show a cognizable injury in fact, therefore, Plaintiffs
must demonstrate that (1) APHIS violated certain procedural
rules; (2) these rules protect Plaintiffs’ concrete interests; and
(3) it is reasonably probable that the challenged action will
threaten their concrete interests. Citizens for Better Forestry
v. U.S. Dep’t of Agric., 341 F.3d 961, 969-70 (9th Cir. 2003).6
  6
   APHIS and Intervenors err in suggesting that Summers rejected the
“reasonable probability” standard. In Summers, the Supreme Court stated
that to seek injunctive relief, plaintiffs must be “under threat of suffering
3110             CENTER FOR FOOD SAFETY v. VILSACK
   [3] The district court properly concluded that these
requirements were satisfied. First, Plaintiffs’ claim that
APHIS violated NEPA by improperly segmenting its environ-
mental analysis is a cognizable procedural injury. See City of
Sausalito v. O’Neill, 386 F.3d 1186, 1197 (9th Cir. 2004)
(noting that the failure to prepare a proper NEPA analysis is
cognizable). That APHIS may in fact have complied with
NEPA does not diminish Plaintiffs’ standing to bring their
claim. Citizens for Better Forestry, 341 F.3d at 971 n.5 (“A
contrary rule would allow only successful environmental
plaintiffs standing to bring their claims.”).

   [4] Second, plaintiffs meet our circuit’s “concrete interest”
test, which “[w]e have described . . . as ‘requiring a geo-
graphic nexus between the individual asserting the claim and
the location suffering an environmental impact.’ ” W. Water-
sheds Project v. Kraayenbrink, Nos. 08-35359, 08-35360, ___
F.3d ___, 2011 WL 149363, at *9 (9th Cir. Jan. 19, 2011)
(quoting Citizens for Better Forestry, 341 F.3d at 971). The
declarations submitted by plaintiffs establish a geographic

‘injury in fact’ that is concrete and particularized; the threat must be actual
and imminent.” 129 S. Ct. at 1149. Yet, Summers reaffirmed the unique
nature of procedural injuries—namely, that a plaintiff seeking to enforce
procedures that protect his concrete interests may do so “without meeting
all the normal standards for redressability and immediacy.” 129 S. Ct. at
1151 (quoting Lujan v. Defenders of Wildlife, 504 U.S. 555, 572 n.7
(1992)); see also Lujan, 504 U.S. at 572 n.7 (explaining that “one living
adjacent to the site for proposed construction of a federally licensed dam
has standing to challenge the licensing agency’s failure to prepare an
[EIS], even though he cannot establish with any certainty that the state-
ment will cause the license to be withheld or altered, and even though the
dam will not be completed for many years”). The “reasonable probability”
standard derives from that principle, see Citizens for Better Forestry, 341
F.3d at 972, which Summers left unchanged, see, e.g., Friends of Tims
Ford v. TVA, 585 F.3d 955, 968 (6th Cir. 2009) (applying “reasonable
probability” standard post-Summers). Of course, as our decision illus-
trates, a plaintiff may establish standing to seek injunctive relief yet fail
to show the likelihood of irreparable harm necessary to obtain it.
                 CENTER FOR FOOD SAFETY v. VILSACK                      3111
nexus between their members and the permitted stecklings as
well as later planting and production of Roundup Ready sugar
beets. For example, Frank Morton owns an organic seed busi-
ness “in the heart of the Willamette Valley,” where most
sugar beet seed is grown, and where Morton grows Beta vul-
garis seed crops, including chard and table beets. See id.

   [5] Finally, it is “reasonably probable” that the challenged
action will threaten Plaintiffs’ concrete interests. As Roundup
Ready sugar beet planting and production proceeds, farmers
like Morton declare that they must test their organic seed
crops to ensure that they are “GE-free” and take preventative
measures such as relocating their fields or creating buffer
zones. See Monsanto, 130 S. Ct. at 2754-55 (recognizing test-
ing and preventative measures, “which [farmers] will suffer
even if their crops are not actually infected with the Roundup
ready gene,” as sufficiently concrete injuries).

   [6] “Once a plaintiff has established an injury in fact under
NEPA, the causation and redressability requirements are
relaxed.” Citizens for Better Forestry, 341 F.3d at 975 (inter-
nal quotations omitted). Since “it is enough that a revised
[NEPA analysis] may redress plaintiffs’ injuries,” causation
and redressability are satisfied here. W. Watersheds Project,
2011 WL 149363, at *9 (quoting Kootenai Tribe of Idaho v.
Veneman, 313 F.3d 1094, 1113 (9th Cir. 2002)).7
  7
   Plaintiffs also meet two additional requirements of standing, which nei-
ther APHIS nor Intervenors dispute. First, as organizations, Plaintiffs must
and do meet the requirements for suing on behalf of their members who
have standing: the issues at stake are germane to the interests of Plaintiffs,
and nothing indicates that resolving this case would require or even be
aided by the participation of their individual members. See Friends of the
Earth, Inc. v. Laidlaw Envtl. Servs. (TOC), Inc., 528 U.S. 167, 181 (2000).
Second, Plaintiffs’ claims fall within NEPA’s zone of interests. See Mon-
santo, 130 S. Ct. at 2756.
3112            CENTER FOR FOOD SAFETY v. VILSACK
                                  V

   [7] “A plaintiff seeking a preliminary injunction must
establish that he is likely to succeed on the merits, that he is
likely to suffer irreparable harm in the absence of preliminary
relief, that the balance of equities tips in his favor, and that an
injunction is in the public interest.” Winter v. Natural Res.
Def. Council, 555 U.S. 7, 129 S. Ct. 365, 374 (2008).

   After Winter, “plaintiffs must establish that irreparable
harm is likely, not just possible, in order to obtain a prelimi-
nary injunction.” Alliance for the Wild Rockies v. Cottrell,
No. 09-35756, ___ F.3d ___, 2011 WL 208360, at *3 (9th
Cir. Jan. 25, 2011). Applying that standard, the district court
concluded that Plaintiffs have demonstrated a likelihood of
irreparable harm stemming from (1) the permitted steckling
plants and (2) the “entire cycle” of Roundup Ready sugar beet
planting and production. On this record, we must disagree,
and we conclude that the district court abused its discretion in
granting a preliminary injunction requiring destruction of the
steckling plants.

   [8] Plaintiffs have not demonstrated that the permitted
steckling plants present a possibility, much less a likelihood,
of genetic contamination or other irreparable harm. The
undisputed evidence indicates that the stecklings pose a negli-
gible risk of genetic contamination, as the juvenile plants are
biologically incapable of flowering or cross-pollinating before
February 28, 2011, when the permits expire.8

  In finding otherwise, the district court alluded to past
examples of contamination with other plants, but mentioned
no “continuing, present adverse effects.” Lujan, 504 U.S. at
563 (quoting Los Angeles v. Lyons, 461 U.S. 95, 102 (1983)).
Past harms can tend to show the threat of a repeated injury,
  8
    Perhaps redundantly, as APHIS points out, the steckling permits con-
tain express conditions prohibiting flowering or pollination.
               CENTER FOR FOOD SAFETY v. VILSACK              3113
Bates v. U.S. Postal Serv., 511 F.3d 974, 985 (9th Cir. 2007),
but the record reveals no examples of contamination by polli-
nation under the restricted conditions imposed by the permits.
To the contrary, APHIS has permitted over 100 confined field
releases of Roundup Ready sugar beets with no known “loss
of confinement,” as the agency explained in NEPA docu-
ments issued with each permit. Plaintiffs give us little reason
not to defer to APHIS’s technical expertise and judgments on
this score. See Lands Council v. McNair, 537 F.3d 981, 993
(9th Cir. 2008) (en banc), overruled on other grounds by Win-
ter, 129 S. Ct. 365.

   Plaintiffs suggest that the district court based its findings on
“substantial, extensive evidence,” but they refer us to evi-
dence of contamination risks in sugar beets and other crops,
all of which speaks to later stages in the sugar beet life cycle.

   The Supreme Court’s recent Monsanto decision, which
spoke to the very regulatory context we review here, provides
guidance. The Court warned against granting injunctive relief
where APHIS’s action is “sufficiently limited” that “the risk
of gene flow to [Plaintiffs’] crops could be virtually nonexis-
tent.” 130 S. Ct. at 2760. Monsanto signaled that if APHIS
were to deregulate Roundup Ready alfalfa in remote geo-
graphic areas, isolated from non-genetically engineered
plants, and under strict conditions, it would be “hard to see
how [plaintiffs] could show that such a limited deregulation
would cause them likely irreparable injury.” Id. Our case con-
cerns Roundup Ready sugar beets, not alfalfa, but in all other
respects, APHIS’s permitting of steckling plants appears to
follow the Court’s blueprint. Plaintiffs offer no evidence to
the contrary.

    [9] On this record, therefore, we conclude that APHIS’s
permitting is “sufficiently limited” that “the risk of gene flow
. . . could be virtually nonexistent.” Id. The district court erred
in finding that the steckling plants present an imminent risk
of environmental harm to Plaintiffs.
3114          CENTER FOR FOOD SAFETY v. VILSACK
   As we have explained, Plaintiffs’ allegations of harm hinge
entirely on later stages of Roundup Ready sugar beet planting
and production, which APHIS’s February 2011 decisions
intend to authorize. In its November 2010 decision, the dis-
trict court credited harms from those then-future activities,
finding a likelihood of harm arising from the “entire cycle” of
Roundup Ready sugar beet planting and production. How-
ever, the steckling permits alone do not authorize Intervenors
to continue growing the juvenile plants beyond February 28,
2011, much less see them flower, produce seeds, or otherwise
visit irreparable harm upon Plaintiffs. Indeed, the permits
require the stecklings to be destroyed, absent new permit
applications by Intervenors and further regulatory decisions
by APHIS.

   [10] At the time Plaintiffs sought the preliminary injunc-
tion, none of the irreparable harms they sought to prevent
were likely. Their alleged irreparable harms hinged on future
APHIS decisions, and nothing prevented Plaintiffs from filing
a new legal challenge if and when those decisions were made.
The alleged irreparable harms are little more than an expres-
sion that “life finds a way.” Michael Crichton, Jurassic Park
159 (Ballantine 1990). However, an invocation to chaos the-
ory is not sufficient to justify a preliminary injunction. Mon-
santo warned against premature review of APHIS’s
regulatory actions under the Plant Protection Act. See 130 S.
Ct. at 2759-61. Plaintiffs are unlikely to face irreparable sub-
stantive harm from the stecklings, and if a subsequent APHIS
decision aggrieves them, they may challenge it and seek
appropriate preliminary relief. Id. at 2761. Under these cir-
cumstances, we conclude that injunctive relief “is not now
needed to guard against any present or imminent risk of likely
irreparable harm.” Id. at 2760.

   Because Plaintiffs have failed to show that they are “likely
to suffer irreparable harm in the absence of preliminary
relief,” Winter, 129 S. Ct. at 374, we need not address the dis-
              CENTER FOR FOOD SAFETY v. VILSACK              3115
trict court’s analysis of the remaining elements of the prelimi-
nary injunction standard.

                               VI

   As we have noted, this appeal presents a thin slice of a
larger litigation. Perhaps, in the end, the entire controversy
will be resolved, and we can say that the “fair discourse hath
been as sugar, [m]aking the hard way sweet and delectable.”
William Shakespeare, Richard II, act 2, sc. 3. Needless to say,
given the course of the litigation, that is unlikely. However,
on the narrow issue presented to us at this juncture, we hold
that the district court abused its discretion in granting the pre-
liminary injunction on the basis of Plaintiffs’ NEPA claim.
The Plaintiffs have failed to show a likelihood of irreparable
injury. Biology, geography, field experience, and permit
restrictions make irreparable injury unlikely.

   [11] Thus, without expressing any views on the merits of
the ultimate issues in this case or other pending related litiga-
tion, we vacate the preliminary injunction, reverse, and
remand for further proceedings consistent with this opinion.

  REVERSED.
