Ngokusobala, inselele enkulu ukondla amadoda angama-33% ngaphezulu ngezinsiza ezifanayo nezamanje. Namuhla, siyazi ukuthi inkinga ayikho kakhulu ekutholakaleni kwezinsiza njengasekusatshalalisweni kwazo emhlabeni wonke kanye nokumosha. Ngakho-ke, u-30% wokukhiqizwa kokudla emhlabeni wonke uyalahleka ngemva kokuvunwa noma umoshwe ezitolo, ezindlini noma ezinsizeni zokudla.¹. Ngaphezu kwalokho, okusanhlamvu okuningi nomhlabathi kubekelwe ukufuywa esikhundleni sokutshala izitshalo zokudla.². Ngenxa yalokho, kubonakala kudingekile ukuba kucatshangwe kabusha ezolimo ukuze zihambisane nezinhloso zombili zezemvelo - ukonga amanzi, ukunciphisa ukukhishwa kwamagesi abamba ukushisa, ukungcola, imfucuza - kanye nezibikezelo zabantu.

Thuthukisa uhlelo lokufuywa kwezilwane

Ukuze kuqiniswe uhlelo lwezemfuyo, umqondo ukukhiqiza inyama eningi usebenzisa ukudla okuncane. Ngalokhu, kuphakanyiswa ukuthi kukhiqizwe izinhlobo zezinkomo ezikhiqiza kakhulu enyameni nasobisini. Namuhla, kukhona kakade izinkukhu ezingafinyelela isisindo sika-1,8 kg nge-2,9 kg yokudla kuphela, izinga lokuguqulwa kwe-1,6, lapho inkukhu evamile kufanele idle i-7,2 kg.². Inhloso ukwehlisa leli zinga lokuguqulwa libe ngu-1,2 ukuze uthole inzuzo ethe xaxa kanye nokusetshenziswa okuncane kokusanhlamvu.

Kodwa-ke, le ndlela ehlukile idala izinkinga zokuziphatha: abathengi baya ngokuya bezwela imbangela yezilwane futhi bakhombisa intshisekelo ekhulayo yokuzalanisa okunomthwalo wemfanelo. Bavikela izimo zokuphila ezingcono zezilwane esikhundleni sokulima ngebhethri, kanye nokudla okunempilo. Ikakhulu, lokhu kuzovumela izilwane ukuthi zingabi nengcindezi encane ngakhoke zikhiqize inyama esezingeni eliphakeme.³. Kodwa-ke, lezi zikhalo zidinga indawo, okusho izindleko eziphezulu zokukhiqiza kwabafuyi - ngakho-ke intengo ephezulu yokuthengisa - futhi azihambisani nendlela yokuzalanisa kakhulu.

Yehlisa ukulahlekelwa nokungcoliswa ngokukhiqiza izinhlobo ezingcono zezitshalo

Ukuguqulwa kwezitshalo ezithile kungase kuhambisane nezolimo ezingangcolisi futhi ezinenzuzo eyengeziwe. Isibonelo, ngokwenza irayisi ehlukahlukene engazweli kangako kasawoti, ukulahleka kungancishiswa uma kwenzeka kuba ne-tsunami eJapan.⁴. Ngendlela efanayo, ukuguqulwa kwezakhi zofuzo zezitshalo ezithile kuzokwenza kube nokwenzeka ukusebenzisa umanyolo omncane, futhi ngenxa yalokho kukhishwe amagesi abamba ukushisa amancane kuyilapho kuzuza ukonga okukhulu. Inhloso kungaba ukwakha izinhlobo zezitshalo ezikwazi ukudonsa i-nitrogen - umanyolo wokukhula - emkhathini futhi zilungiswe.². Kodwa-ke, ngeke nje sikufeze lokhu cishe iminyaka engamashumi amabili, kodwa lezi zinhlelo zisengozini yokungqubuzana nomthetho ovimbelayo (ikakhulukazi eYurophu) mayelana nezinto eziphilayo eziguqulwe izakhi zofuzo. Ngempela, alukho ucwaningo lwesikhathi eside oluye lwabonisa ukungabi nangozi kwabo empilweni yethu. Ngaphezu kwalokho, le ndlela yokuguqula imvelo idala izinkinga ezisobala zokuziphatha.

S ParisTech Review, Inyama yokwenziwa kanye nokupakishwa okudliwayo: ukunambitha ukudla kwesikhathi esizayo, www.paristechreview.com, 2015 M. Morgan, UKUDLA: Ungaphakela kanjani abantu bomhlaba bakusasa, www.irinnews.org, 2012 M. Eden , Inkukhu: inkukhu yesikhathi esizayo ngeke icindezeleke kancane, www.sixactualites.fr, 2015 Q. Mauguit, Ikuphi ukudla ngo-2050? Uchwepheshe uyasiphendula, www.futura-sciences.com, 2012