Nev. Rev. Stat. § 40.502
"Environmental provision" means any written representation, warranty, indemnity, promise or covenant relating to the existence, location, nature, use, generation, manufacture, storage, disposal, handling, or past, present, future or threatened release of any hazardous substance from, in, into or onto real collateral, or to past, present or future compliance with any law relating thereto, made by a debtor in conjunction with the making, renewal or modification of a loan, extension of credit, guaranty or other obligation involving the debtor, whether or not the representation, warranty, indemnity, promise or covenant is or was contained in or secured by the mortgage and whether or not the mortgage has been discharged, reconveyed or foreclosed upon.
NRS 40.502