No nā mea kanu wela nui, nā awa lawe lanahu, nā mines lanahu, nā mines, nā mea kūkulu hale a me nā wahi ʻē aʻe e pono ai ka hoʻoneʻe ʻana i ka hao kiʻekiʻe, a hiki ke hana maʻamau i nā wahi paʻakikī e like me ka lepo, humidity, a me ka paʻakai paʻakai koʻikoʻi corrosion. ʻano hoʻoluʻu no ke kahua electromagnetic i ka honua.