Plaintiffs-Appellants P. Bordages-Account B, L.P.; Bordages Company; and Robert F. Ford (collectively, “Appellants”) appeal the district court’s grant of partial summary judgment in favor of DefendantAppellee Air Products, L.P. 1 and the court’s denial of Appellants’ motion for summary judgment. Appellants own pieces of land burdened by pipeline easements. Air Products is the current owner of the easements and operator of the pipelines.

The easements allow for the “transportation of oil, petroleum, gas, the products of each of the same, water, other liquids and gases, and mixtures of any of the foregoing.” (Emphasis added). Air Products transports hydrogen through the pipelines. The main issue in this case is whether the language “gas” and “other ... gases” includes hydrogen.

In C & E Land Co. v. Air Products LP, 401 F.3d 602 (5th Cir. 2005), we decided this precise question in the affirmative. The language in the pipeline easements in C & E Land was identical to the language of the easements in this case. Id. at 603. There, we held that “the language of the easement ... unambiguously allows Air Products to transport hydrogen,” because the plain meaning of “gas” and “other ... gases” includes hydrogen. Id. C & E Land controls this case. Accordingly, we hold that the easement allows for the transportation of hydrogen.

Appellants also argue that their motion for summary judgment should have been granted because they own the surface fee title to the pipeline strips. Appellants cite Davidson v. Gelling, 153 Tex. 56, 263 S.W.2d 940 (1954), and, without more, state that “judgment should be entered in accordance with Davidson.” It is not clear how Davidson supports Appellants’ case, however, nor have Appellants provided us with any explanation. In short, Appellants’ briefing of this issue is insufficient. Therefore, they have waived this argument. See Fed. R.App. P. 28(a)(9)(A).

For the foregoing reasons, we AFFIRM the judgment of the district court granting partial summary judgment in favor of Air *726 Products and denying Appellants’ motion for summary judgment.

AFFIRMED.