He momo kirihou te PVC e whakamahia whānuitia ana i roto i ngā rauemi hanga. Nō reira, e kore e roa te whakakapinga mō te wā roa, ā, he nui ngā tūmanakohanga mōna ki ngā wāhi kāore i te tino whanake ā muri ake nei.
E mōhio ana tātou katoa, e rua ngā huarahi hei whakaputa PVC, ko tētahi ko te tikanga ethylene whānui o te ao, ā, ko tētahi ko te tikanga konupūmā carbide ahurei i Haina. Ko ngā pūtake o te tikanga ethylene ko te hinu te nuinga, ko ngā pūtake ia o te tikanga konupūmā carbide ko te waro, te kōhatu me te tote. Ko ēnei rauemi kei Haina te nuinga. Mō te wā roa, ko te tikanga konupūmā carbide PVC a Haina kei te tūranga tino ārahi. Ina koa mai i te tau 2008 ki te 2014, kua piki haere te kaha whakaputa PVC a Haina mō te tikanga konupūmā carbide, engari he maha ngā raruraru tiaki taiao kua puta mai.
He tino nui te whakamahinga hiko o te hanga konupūmā kāpira, nō reira ka puta he wero ki te tuku hiko o Haina. Nā te mea ka puta te hiko mā te tahu waro, me nui te waro e pau ana, nō reira ka poke te āhuarangi i te tahunga o te waro. Heoi, kua huri haere ngā kaupapa here a Haina i ngā tau kua pahure. Kei te whakapai tonu a Haina i tana mekameka ahumahi. Ināianei ka kite tātou kua kawemai a Haina i te nui o te hinu, ā, kei te akiakihia ngā umanga ā-rohe ki te kawemai i te hinu hei whakapai ake i ngā hua o raro. Nō reira, i ngā tau tata nei, kua tāpirihia he maha ngā kaihanga tukanga ethylene hou ki Haina, ā, ko te kaha whakaputa PVC hou katoa i Haina i ngā tau tata nei ko te kaha whakaputa o te tukanga ethylene. Kua mutu te whakaaetanga hou mō te kaha whakaputa o te tikanga konupūmā kāpira a Haina. Nō reira, i roto i ngā tau tata nei, ka piki haere tonu te maha o ngā tipu ethylene i Haina, ā, ka heke haere tonu te tukanga konupūmā kāpira. I ngā tau kei te heke mai, ka piki haere tonu te nui o te kaweake o te tukanga ethylene a Haina, ā, ka noho hei kaihokohoko matua o te ao mō te tukanga ethylene PVC.
Wā tuku: Mei-07-2022