Whakarāpopototia te tuhinga:  Ko nga ra o te whakakii i to motuka ki te penehi ka taea te tatau na te mea kua kaha ake nga kairangahau ki te hanga i te hinu hauwai mai i nga otaota tipu. Kua kitea e ngā pūtaiao o Amerika tētahi huarahi hei whakamahi i ngā kākano me ngā rākau o te witi kua maka ki te hanga i te pūkaha hauwai iti e kore e whakapoke i te taiao pērā i ngā pūkaha pūkaha. Ka taea e te whakatutukitanga te kite i tētahi rā ka whakaputaina te wahie i te rohe, ā, ka mutu ngā taraiwa ki te whakaki i ō rātou waka ki ngā pūkaha koiora i te taha o te rori, kaua ki te kōkiri hinu ki roto i tō rātou pūkaha. Kua kitea e ngā pūtaiao o Amerika tētahi huarahi hei whakamahi i ngā kākano witi me ngā rākau hei hanga i te pūkaha hauwai iti e kore e poke i te taiao pēnei i ngā pūkaha pūkaha, ā, ka taea te whakatere i te tango pūkaha hauora mō ngā waka. Ko ngā waka hauwai taiao, he mea tūturu kē, e tuku ana i te wai anake, engari he utu nui te hau, ā, ehara i te mea ngāwari ki te rokiroki, arā, he nui ake te rangahau e hiahiatia ana kia riro ai ngā waka hauwai hei kaupapa matua. Inaianei, kua whakaaturia e ngā kairangahau o te Virginia Polytechnic Institute me te State University e taea ana te huri i te 100 ōrau o te huka i roto i ngā kākano me ngā kākano o te witi - he hua o te ahuwhenua - ki te hau hauwai, ka taea te whakamahi hei pūkaha waka. I mua, ka taea anake te huri i waenganui i te 30 me te 60 ōrau o te huka tipu ki te hauwai, mā te whakamahi i ngā pūkaha ahumahi, i ngā tikanga whakaranu rānei, e ai ki te pūrongo a The Independent. Ko te whāinga whakamutunga, ko te whakaputa i te nui o te hauwai mai i te ururua o te hua, no te mea he nui rawa te utu o te nuinga o nga tikanga o nāianei, ka whakamahi ranei i nga hua kai. Ka taea e te whakatutukitanga te kite i tētahi rā ka whakaputaina te wahie i te rohe, ā, ka mutu ngā taraiwa ki te whakaki i ō rātou waka ki ngā pūkaha koiora i te taha o te rori, kaua ki te kōkiri hinu ki roto i tō rātou motokā. He maha nga tau, e mahi ana nga kaiputaiao ki te whakawhanake i nga waka pūhiko wahie e whakahaerehia ana e te hauwai parakore, engari kaore i te tino mohio me pehea te rokiroki i te matū. Inaianei, kua tata pea ngā kairangahau o te Whare Wānanga o Benaras Hindu o Īnia ki te whakaoti i tēnei raruraru mā te whakamahi i ngā kākano kākano ki te rokiroki i te hauwai i roto i te āhua hau. He tino uaua te rokiroki i te hauwai waipiro nā te mea me pupuri i te tino...
I kitea e ngā kairangahau o te Virginia Polytechnic Institute me te State University tētahi huarahi hei whakamahi i ngā kākano witi me ngā rākau hei hanga i te pūkaha hauwai iti te utu. I whakamahia he tikanga whai hua hei huri i te 100% o nga huka tipu hei wahie 'kakariki'. I mua, 60% anake o ngā huka i taea te huri hei hauwai. Ka taea e Breakthrough te kite i ngā kaihautū waka e whakaki ana i ngā pūkaha koiora i te taha o te rori.