The whole arid/semi-arid region of Australia is within 1000 km from the coast. Even the pole of inaccessibility in Africa, which also has a vast arid/semi-arid region, is 1814 km. Therefore, the analysis within 1000 km is sizable to analyze the land area on the earth. Figure shows Dtotal when the ratio of PV electricity allocated to seawater desalination and ammonia synthesis is varied. Since Section 3.1 indicates that LCCO2 emission from fuel-based electricity generation significantly impacts seawater desalination and ammonia synthesis, two natural gas or coal cases are analyzed. The results show that even for a city with 1000 km inland, LCCO2 emissions can be reduced if desalination receives more than 60% of PV electricity for the natural gas case and 40% for the coal case.