Plaintiff-appellant Victor Browning appeals from an order of the United States District Court for the Southern District of New York (Stein, J.) affirming an order of the United States Bankruptcy Court for the Southern District of New York (Gonzalez, J.) granting the reorganized debtor-appellee MCI, Inc.’s motion to bar Browning from prosecuting Kansas state law claims for trespass and unjust enrichment against MCI, Inc. following its emergence from a Chapter 11 proceeding. We hold that, to the extent Browning’s claims are viable under Kansas state law, they are pre-petition claims that were discharged by cоnfirmation of MCI, Inc.’s plan of reorganization.
BACKGROUND
In the late 1980s, a subsidiary of or predecessor to MCI, Inc. installed fiber-optic telecommunications cables along a railroad right of way that ran through land owned by Browning in Kansas. In 2001, Browning filed a putative class action in Kansas state court against predecessors in interest to MCI 1 on behalf of himself and similarly situated landowners, alleging that MCI was trespassing on his land and had been unjustly enriched by its unauthorized use of his property. Shortly thereafter, *982 MCI filed a voluntary petition for bankruptcy, and eventually obtained an order from the bankruptcy court enjoining Browning from further prosecuting his Kansas state law claims. Browning appealed that order to the district court, and, having lost there, now appeals to us.
A. Browning’s Putative Class Action
Browning’s putative class action complaint contended that MCI was trespassing on the plaintiffs’ land and had been unjustly enriched by that unlawful use. More specifically, the complaint framed, as an issue common to the purported class, “[wjhether MCI has and continues to intentionally and unlawfully trespass on the property owned by plaintiff and members of the Class by installing, maintaining and operating fiber optiс cable on the property without authority.” Browning further contended that MCI would be unjustly enriched if it were permitted to retain the entirety of its past or future profits from the use or sale of the fiber optic cable.
MCI removed the case to the United States District Court for the District of Kansas, which in turn transferred the action to the United States District Court for the Northern District of Oklahoma, where a similar case filed by other landowners was pending. Soon thereafter, MCI filed in the United States Bankruptcy Court for the Southern District of New York a voluntary petition for protection under Chaрter 11 of the United States Bankruptcy Code, 11 U.S.C. § 101 et seq. Upon learning of the petition, the Oklahoma federal district court administratively closed Browning’s case. Browning did not file a proof of claim in the bankruptcy proceeding, although it had notice of the proceeding and an opportunity to file a proof of claim. MCI’s plan of reorganization was confirmed by the bankruptcy court in October 2003, and became effective in April 2004.
After confirmation of MCI’s plan of reorganization, Browning moved the Oklahoma federal court to reopen his case. MCI responded by moving the bankruptcy court to bar Browning from further prosecuting his claims against MCI on the ground that they had been discharged by the confirmation of the plan. In opposition, Browning argued that his claims were not discharged because they arose from actions that continued after confirmation of the plan.
B. Bankruptcy Court Decision
The bankruptcy court granted MCI’s motion to bar Browning from further prosecuting his claims against MCI.
In re WorldCom, Inc.,
With respect to whether the light pulses could give rise to an action for trespass, the bankruptcy court first noted that the “traditional” view of trespass law extended only to tangible invasions and relegated intangible invasions to nuisance law.
Id.
at 776. It further noted that some states have adopted a more relaxed “modern” view, under which certain intangible invasions were cognizable as trespasses.
Id.
But, the bankruptcy court observed, those states require the plaintiff to establish that the intangible invasion caused damages to land, whereas damages are presumed in
*983
the case of a tangible trespass.
Id.
at 776-77. After surveying the laws of various other states and two relevant decisions of the United States District Court for the District of Kansas, the bankruptcy court predicted that Kansas law would recognize intangible trespass claims in cases in which the plaintiff could establish that the invasion had caused damage to the
res. Id.
at 779-82 (discussing
City of Shawnee v. AT & T Corp.,
C. District Court Decision
Browning timely appealed the bankruptcy court’s decision to the district court, pursuant to 28 U.S.C. § 158(a). On appeal, Browning argued, inter alia, that: (1) the bankruptcy court improperly applied Kansas trespass law; (2) the bankruptcy court misconstrued the factual and legal bases for the alleged trespass; (3) the bankruptcy court’s application of Kansas trespass law conflicted with Kansas public policy; and (4) the bankruptcy court failed to address Browning’s unjust enrichment claim. In opposition, MCI argued, inter alia, that all of Browning’s claims had been extinguished by the confirmation of the Plan and, in any event, the bankruptcy judge properly determined that Browning could not maintain an action for a continuing trespass.
The district court affirmed the decision of the bankruptcy court.
In re WorldCom, Inc.,
Like the bankruptcy court, the district court found that some courts, including those in Kansas, have departed from the traditional view that intangible intrusions could not give rise to trespass and have recognized trespasses from intangible intrusions where the intrusion has caused damage to the plaintiffs property. Id. at 841. The district court then predicted, as had the bankruptcy court, that Kansas law would require a plaintiff asserting a claim of intangible trespass to establish that the alleged invasion had caused damage to the res. Id. at 841-42. The district court concluded that, because the light pulses were intangible trespasses, and because Browning had failed to show damages, Browning could not “establish a trespass claim stemming from those pulses; any valid trespass claim would have to involve the tangible cables themselves.” Id. at 842.
With respect to the cables, the district court drew upon the Kansas courts’ distinction between continuing and permanent nuisances, pursuant to which a nuisance is deemed permanent when the structure giving rise to it is “not easily abatable.”
Id.
at 843. The court noted that, consistent with that distinction, the United States District Court for the District of Kansas had previously held that “fiber optic cables ... constituted permanent trespasses because they are not-easily removable.”
Id.
(citing
City of Shawnee,
Finally, the district court determined that Browning had waived his unjust enrichment claim by failing to argue it to the bankruptcy court in response to MCI’s motion. Irrespective of waiver, the district court held, any unjust enrichment claim with respect to the cables had been discharged and any such claim with respect to the light pulses was without merit. Id. at 844-45.
Browning timely appealed the district court’s judgment to this Court.
DISCUSSION
When a district court acts as an appellate court in a bankruptcy case, its decisions are subject to plenary review.
Smith v. Geltzer (In re Smith),
I. Bankruptcy Discharge
Under the Bankruptcy Code, confirmation of a plan of reorganization “discharges the debtor from any debt that arose before the date of such confirmation.” 11 U.S.C. § 1141(d)(1)(A). A “debt” is defined to mean “liability on a clаim,” and, in turn, a “claim” is defined to include any “right to payment, whether or not such right is reduced to judgment, liquidated, unliquidated, fixed, contingent, matured, unmatured, disputed, undisputed, legal, equitable, secured, or unsecured.” 11 U.S.C. § 101(5)(A), (12). Congress gave the term “claim” “the broadest available definition” in the Bankruptcy Code.
FCC v. NextWave Pers. Commc’ns Inc.,
The bankruptcy court’s order confirming MCI’s plan of reorganization specifically provides that:
[e]xcept as provided in the Plan, upon the Effective Date, all existing Claims against the Debtors ... shall be, and shall be deemed to be, discharged and terminated, and all holders of Claims ... shall be precluded and enjoined from asserting against the Reorganized Debtors, or any of their assets or properties, any other or further Claim ... based upon any act or omission, transaction, or other activity of any kind or nature that occurred prior to the Effective Date, whether or not such holder has filed a proof of Claim....
In re WorldCom, Inc., Ch. 11 Case No. 02-13533, ¶ 16 (Bankr.S.D.N.Y. Oct. 31, 2003) (order confirming modified second amendеd joint plan of reorganization). Browning acknowledges that confirmation of MCI’s plan of reorganization discharged all “claims” against MCI that predated the filing of MCI’s Chapter 11 petition. For the reasons explained below, however, he contends that MCI’s alleged wrongful actions “straddle” its bankruptcy proceedings, and that he is entitled therefore, both *985 as a matter of Kansas state law and under the Bankruptcy Code, to recover for MCI’s post-confirmation use of the fiber optic cables on his property.
II. Browning’s Claims Have Been Discharged
A. Trespass
1. The Light Pulses
We begin with Browning’s claim that each new light pulse transmitted through the cables on his property gives rise to a new action for trespass. We agree with both lower courts that this claim would not be cognizable under Kansas law in the absence of an allegation that the light had caused damage to Browning’s land.
Under Kansas law, a trespass is accomplished by a person “who intentionally and without a consensual or other privilege ... enters land in possession of another or any part thereof or causes a thing or third person so to do.”
Riddle Quarries, Inc. v. Thompson,
As the bankruptcy and district courts noted, however, some courts have adopted a “modern” view of trespass that recognizes intangible invasions.
See, e.g., Public Service Co. of Colo. v. Van Wyk,
In this case, Browning effectively seeks to apply the modern view to recover for an intangible trespass without showing that his land was damaged by the alleged invasion. But Browning has identified no court of the state of Kansas that has applied the modern view without requiring proof of physical damages to the res, and we have not found any such decision. We confidently predict that the Kansas Supreme Court, if it were to recognize intangible trespasses at all, would apply the modern view and would require a plaintiff asserting a claim of intangible trespass to establish that the invasion had caused *986 damage to the res. 2 Under this approach, Browning’s claim of trespass by light pulses would fail because he has not alleged any resulting damage to his land.
Our prediction of Kansas law is informed by a Kansas Supreme Court decision issued shortly after the parties argued this appeal. Specifically, in
Smith v. Kansas Gas Service Co.,
the Kansas Supreme Court stated in dicta that a plaintiff “must prove substantial dаmages to the land to recover for [an] intangible invasion.”
Moreover, this result is entirely consistent with the policies underlying the tort of trespass. Trespass law protects a person’s exclusive possessory interest in property. Keeton et al.,
supra,
§ 13, at 67. That interest is necessarily infringed when a person places a tangible thing upon the land without permission or privilege.
Cf. Adams v. Arkansas City,
Accordingly, we conclude that if Kansas were to recognize Browning’s claim of trespass by the light pulses transmitted through the fiber optic cables buried on his land, it would require Browning to allege that the invasion had caused substantial damage to his land. Because he has failed to allege any such damage, this claim fails irrespective of the bankruptcy discharge.
2. The Cables
With respеct to the presence of the cables on Browning’s land, any claim of trespass existed prior to the filing of MCI’s bankruptcy petition and was discharged by confirmation of its plan of reorganization. 6
Browning and MCI agree that the cables were installed sometime in the late 1980s. Accordingly, if the installation was not consensual or privileged, a cause of action for MCI’s alleged trespass to install the cables accrued then.
See Riddle Quarries,
Browning argues, however, that the continuing presence of the cables on his land constitutes a “continuing” tort, for which a new cause of action accrues daily. The Kansas Supreme Court has in fact recognized the theory of continuing trespass.
See United Proteins, Inc. v. Farmland Indus., Inc.,
Nevertheless, even assuming that MCI committed a continuing trespass, any such claim was discharged by confirmation of MCI’s plan of reorganization, due to the expansive scope of the Bankruptcy Code’s definition of “claim” and Browning’s failure to allege any relevant pоst-confirmation conduct or unforeseeable damages. It is well-established under Kansas law that a plaintiff asserting a claim of continuing trespass can elect to bring an action for all past, present, and future damages inflicted thereby.
McDaniel v. City of Cherryvale,
Any seeming injustice from this result stems from Browning’s own failure to file a proof of claim in the bankruptcy proceeding, and from Congress’s policy decision to afford reorganizing debtors a fresh start at the possible expense of creditor interests. This case is unlike those upon which Browning relies in which courts have rejected defendants’ efforts to insulate themselves from post-confirmation liability by linking the alleged violations to pre-petition conduct. For instance, in
O’Loghlin v. County of Orange,
the plaintiff brought an action against her municipal employer under the Americans with Disabilities Act, 42 U.S.C. §§ 12101-12213 (“the ADA”), alleging violations of the ADA both before and after the discharge of the employer’s debts pursuant to a bankruptcy plan of reorganization.
B. Unjust Enrichment
In addition to his common law trespass claims, Browning asserted a claim of unjust enrichment, arguing that MCI should be disgorged of the profits it has earned from its unauthorized use of his land. The district court found that Browning had waived this claim by failing to argue it to the bankruptcy court,
In re Worldcom, Inc.
*990
In any event, Browning’s unjust enrichment claim also is without merit. The basic elements for an unjust enrichment claim under Kansas law are: “(1) a benefit conferred upon the defendant by the plaintiff; (2) an appreciation or knowledge of the benefit by the defendant; and (3) the acceptance or retention by the defendant of the benefit under such circumstances as to make it inequitable for the defendаnt to retain the benefit without payment of its value.”
Haz-Mat Response, Inc. v. Certified Waste Servs. Ltd.,
CONCLUSION
For the reasons discussed, we AFFIRM the order of the district court affirming the order of the bankruptcy court enjoining Browning from further prosecuting his Kansas state law claims against MCI.
Notes
. Browning filed suit against MCI WorldCom Network Services, Inc., MCI WorldCom Communications, Inc., and MCI WorldCom, Inc. Those entities subsequently reorganized as MCI, Inc. Because the corporate structure is not relevant to this appeal, we refer to the pre-bankruptcy entities and the reorganized debtor both as "MCI.”
. A separate panel of this Court previously denied Browning’s motion to certify to the Kansas Supreme Court two questions regarding Kansas law.
Browning v. MCI, Inc.,
No. 06-2079-bk (2d Cir. Jul. 21, 2006). We are similarly convinced that this case does nоt present “any of the exceptional circumstances that would justify using the certification procedure,”
DiBella v. Hopkins,
.
Gross
involved a claim of trespass arising from the unauthorized use of the plaintiffs’ parking lot by the defendants' employees.
Accordingly, the holding of
Gross
is limited to tangible, rather than intangible, trespass claims. But in
Smith,
the Kansas Supreme Court nevertheless cited
Gross
for the proposition that a "plaintiff must prove substantial damages to the land to recover for intangible invasion,” and predicted on that basis that claims relating to a leak of natural gas would "likely” fail if pursued on a trespass theory under Kansas law.
.It is true that the United States District Court for the District of Kansas arrived at a different conclusion in
City of Shawnee,
and held that Kansas law would recognize a claim of intangible trespass without requiring the plaintiff to allege damage to the land.
. Browning argues that distinguishing between tangible and intangible invasions is untenable because many purported "intangible” invasions are in fact accomplished by small particles. Even light, he argues, can be described as both energy and particle. However accurate that may be as a matter of physics, it does not represent the law of torts, which hаs long distinguished between tangible and intangible invasions and has deemed invasions by light to be the latter. See, e.g., Keeton et al., supra, § 13, at 71 ("Thus, it is not a trespass to project light, noise, or vibrations across or onto the land of another.”). We are confident that the Kansas Supreme Court would have no difficulty distinguishing an invasion by pulses of light from an invasion by a tangible thing such as a person or other object.
. We note that Browning may have waived this claim by failing to present it to the bankruptcy court. In his opposition to MCI’s motion, Browning assured the bankruptcy court that the "gist” of his post-petition claims against MCI was “the use of the fiber to transmit signal pulses (as opposed to the original installation and presence of the below ground facilities).” The bankruptcy court reasonably interpreted this to mean that Browning’s trespass action related to the alleged invasion by intangible light pulses rather than the cables' continuing existence on his land.
In re WorldCom, Inc.,
. Both the bankruptcy court and the district court characterized claims relating to the рhysical cables as arising from a "permanent” rather than a "continuing” trespass.
In re Worldcom, Inc.,
. We also deem waived Browning’s related claim under K.S.A § 58-2520, which provides
*990
that "[t]he occupant without special contract, of any lands, shall be liable for the rent to any person entitled thereto.” Browning did not assert this claim in his class action petition, and did not identify this statute when responding to MCI’s motion in the bankruptcy court to enjoin Browning from further prosecuting "all claims against MCI.”
See Schmidt v. Polish People’s Republic,
