I ka ʻoihana eli lanahu, hiki i nā huahana kānana ke kānana maikaʻi i nā ʻāpana maikaʻi i ka ea a i ʻole ka wai, nā mea haumia paʻa, a me nā pauka i hana ʻia e ka lole a me ka waimaka, e hōʻoiaʻiʻo ana i ka maʻemaʻe o ka wai a i ʻole ka ea.Hiki i kēia ke hoʻolōʻihi i ke ola o nā mea hana eli lanahu, hoʻemi i nā manawa mālama, a hoʻohaʻahaʻa i nā kumukūʻai hoʻokele.
Hiki iā mākou ke hāʻawi i nā huahana kānana pili e pili ana i ka ʻoihana mining Coal.
