

The letter and spirit of the paragraph both seem quite clear to me. The united Germany was to become party to the same treaties as West and East Germany with regard to nuclear, biological and chemical weapons. The NPT is the legal text of the “renunciation” of nuclear weapons, even though that specific word doesn’t actually appear in the NPT. Germany’s rights and obligations under the NPT are the same as those of all other signatories.
Germany’s gas consumption isn’t declining and is approximately the same in 2025 as it was in 1995.