Section 4 In case the damage or destruction stated in Article X, Section 2, shall occur during the last year of the term of this Agreement, or during any renewal term, and shall amount to twenty-five (25%) percent or more of the replacement cost, (exclusive of the land and foundations), either Lessor or Lessee may terminate this Agreement by sending written notice to other party within thirty (30) days after the occurrence of such damage or destruction. Upon termination, as aforesaid, by either party hereto, this Agreement and the term thereof shall cease and come to an end, any unearned rental or other charges paid in advance by the Lessee shall be refunded to the Lessee, and the parties shall be released hereunder, each to the other, from all liability and obligations hereunder thereafter arising.