Njengoba igagasi lomhlaba wonke lentuthuko esimeme liqhubeka nokukhula, abathengi bafaka izidingo ezimbili ekusebenzeni komkhiqizo kanyeubungane nemvelo. Ngezinzuzo zayo eziyingqayizivele zokuba lula, ukuzinza kakhudlwana, ukulondoloza imvelo kakhudlwana, kanye nokonga imali,izitsha zokudla ze-wheat strawiye yagqama phakathi kwezitsha zepulasitiki zendabuko, izinkuni zokhuni, kanye ne-PLA (polylactic acid), yaba ukukhetha okuthandwayo emakethe. Lezi zitsha zetafula ezintsha zishintsha iphethini yemakethe yezitsha zetafula ezisimeme emhlabeni wonke ngokulinganisela kwayo okuphelele kokusebenza kanye nenani - kubikezelwa ukuthi isikali semakethe sizofinyelela ku-302.7 billion zamaRandi aseMelika ngo-2034.

Izitsha zokudla zotshani bukakolweni zineizinzuzo ezisobalangaphezu kwezitsha zepulasitiki zendabuko. Nakuba izitsha zepulasitiki zishibhile, ziyingozi kakhulu emvelweni; ukubola kwazo kuthatha amakhulu eminyaka futhi kwandisa ukungcoliswa kwepulasitiki emhlabeni jikelele. Ngokuphambene nalokho, izitsha zepulasitiki zotshani lukakolweni zenziwa ngemfucuza yezolimo, kusetshenziswa ngokugcweleutshani bukakolwenilokho bekungashiswa, okungagcini nje ngokunciphisa ukukhishwa kwamagesi okushisa ukushisa kodwa futhi kuqinisekisa ukusetshenziswa kwemithombo yemfucuza. Ngaphezu kwalokho, izitsha zokudla zotshani bukakolweni zilula ngo-20% kunepulasitiki ngokwesilinganiso, okwenza kube lula ukuthuthwa nokusetshenziswa, kanye nesakhiwo saso sefayibha esiqinisiwe kungathuthukisa ukuzinza, kugwemeke inkinga yokuthi ipulasitiki esezingeni eliphansi ithambekele ekuqhekekeni nasekuguquguqukeni ngaphansi kokushisa okuphezulu noma ingcindezi.

Uma kuqhathaniswa nezitsha zokudlala ezenziwe ngokhuni lwe-bamboo, izitsha zokudlala zotshani lukakolweni zinezinzuzo eziningi ngokusebenza kahle kanyeukusimamaNakuba izitsha zokudlala ezenziwe ngokhuni lwe-bamboo nazo ziyinto yemvelo, zidinga ukunciphisa izinsiza ezikhula ngokushesha kodwa ezisalinganiselwe. Ngaphezu kwalokho, ubuso bazo obunezimbobo kulula ukubumunca uwoyela nomswakama, okuholela ekukhuleni kwesikhunta futhi kufinyeze impilo yenkonzo. Ngokuphambene nalokho, izitsha zokudlala zotshani bukakolweni zinendawo engenazimbobo, ziyamelana nesikhunta namabala, futhi zingakwazigcina ukuzinzangisho nangemva kokusetshenziswa okuphindaphindiwe. Ngesikhathi esifanayo, ilula kunezitsha zokudla ezenziwe ngokhuni lwe-bamboo, okunganciphisa izindleko zokuhamba kanye nomphumela we-carbon wamabhizinisi.

Njengezinto zokudla ezivamile ezibolayo,Izitsha zokudla ze-PLAisengozini kokubili ngezindleko kanye nokusebenza kwayo uma iqhathaniswa nezitsha zokudla zikakolweni. Izitsha zokudla ze-PLA zenziwe ngesitashi sommbila noma ngomoba, okuholela ezindleleni zokukhiqiza eziphezulu ezidluliselwa kubathengi ekugcineni. Ngaphezu kwalokho, iyaphuka kalula, kulula kakhulu ukuyilimaza ezindaweni ezishisa kakhulu, futhi ukubola kwayo kudinga izimo ezithile zokwenza umquba wezimboni. Ngokuphambene nalokho, izitsha zokudla zikakolweni zishibhile ngo-15%-25% kune-PLA, ngezinzuzo ezinkulu zokusebenza kwezindleko. Ingonakaliswa ngokwemvelo ezinyangeni eziyi-6-12 ngaphansi kwezimo ezijwayelekile zokwenza umquba, futhi ngesikhathi esifanayo inokuqina okuhle kakhulu kanyeukumelana nokushisa.

Umhlaziyi wemboni uthe: “Izitsha zokudla zikakolweni zibhekana ngokunembile nezindawo eziyinhloko zobuhlungu bezinye izindlela ezikhona — zilula ukusetshenziswa nsuku zonke, zizinzile kakhulu ekusetshenzisweni okungokoqobo, zinobungani nemvelo kakhulu emhlabeni, futhi zingabizi kakhulu kokubili emabhizinisini nakubathengi.” Ngokuqiniswa okuqhubekayo kwezinqubomgomo zokuvinjelwa kwepulasitiki emhlabeni jikelele, ukusimama kube yinto ebalulekile ekuthengeni. Izitsha zokudla zikakolweni kulindeleke ukuthi zithathe isabelo esikhulu semakethe, zinikeze ikhambi elizuzisa bonke ekuvikeleni imvelo nasekusetshenzisweni okungokoqobo, futhi zibe yisilinganiso esisha emkhakheni wezitsha zokudla eziqhubekayo emhlabeni wonke ngesici sazo esiyingqayizivele.izinzuzo ezihlukene.