Mukasiya kudya nyama, mpweya wanu wokhudzana ndi chakudya udzakhala ndi theka. Uku ndikutsika kwakukulu kuposa momwe amaganizira kale, ndipo deta yatsopano imachokera ku deta yazakudya kuchokera kwa anthu enieni.
Gawo lathunthu la magawo anayi a mpweya wotenthetsera dziko lathu limachokera ku kupanga chakudya. Komabe, sizikudziwika kuti ndi ndalama zingati zomwe anthu angapulumutse ngati atasintha kuchoka ku steak kupita ku tofu burgers. Malinga ndi kuyerekezera kwina, kupita ku vegan kungachepetse mpweyawo ndi 25%, koma zonse zimatengera zomwe mumadya m'malo mwa nyama. Nthawi zina, utsi ukhoza kuwonjezeka. Peter Scarborough ndi anzake ku Oxford University anatenga deta yeniyeni ya zakudya kuchokera kwa anthu oposa 50000 ku United Kingdom ndikuwerengera zakudya zawo za carbon. "Iyi ndi ntchito yoyamba yomwe imatsimikizira ndikuwerengera kusiyana," akutero Scarborough.
Letsani kutulutsa mpweya
Asayansi apeza kuti phindu likhoza kukhala lalikulu. Ngati omwe amadya magalamu 100 a nyama patsiku - nyama yaying'ono - atakhala vegan, mpweya wawo ukhoza kuchepetsedwa ndi 60%, kuchepetsa mpweya wa carbon dioxide ndi matani 1,5 pachaka.
Nachi chithunzi chenicheni: ngati amene amadya magalamu oposa 100 a nyama patsiku akanati achepetse kudya kwawo kufika pa magalamu 50, phazi lawo lingatsika ndi gawo limodzi mwa magawo atatu. Izi zikutanthauza kuti pafupifupi matani a CO2 amapulumutsidwa pachaka, ofanana ndi gulu lazachuma chowuluka kuchokera ku London kupita ku New York. Okonda pescatarian, omwe amadya nsomba koma osadya nyama, amangowonjezera 2,5% kuposa omwe amadya masamba. Komano, zamasamba, ndizo "zogwira mtima" kwambiri, zomwe zimathandizira 25% yocheperako pakutulutsa mpweya kuposa zamasamba omwe amadya mazira ndi mkaka.
"Pazonse, pali kutsika kowonekera komanso kolimba kwa mpweya wotuluka chifukwa chodya nyama yochepa," akutero Scarborough.
Kodi kuganizira kwambiri chiyani?
Palinso njira zina zochepetsera mpweya, monga kuyendetsa galimoto pafupipafupi komanso kuwuluka, koma kusintha kwa zakudya kumakhala kosavuta kwa ambiri, Scarborough akuti. "Ndikuganiza kuti n'kosavuta kusintha zakudya zanu kusiyana ndi kusintha mayendedwe anu, ngakhale ena angatsutse."
"Kafukufukuyu akuwonetsa ubwino wa chilengedwe cha zakudya zochepa za nyama," anatero Christopher Jones wa yunivesite ya California ku Berkeley.
Mu 2011, Jones anayerekezera njira zonse zomwe banja laling'ono la ku America lingachepetse mpweya wawo. Ngakhale kuti chakudya sichinali gwero lalikulu la utsi, m’derali munali m’mene anthu ankatha kusunga ndalama zambiri mwa kuwononga chakudya chochepa komanso kudya nyama yochepa. Jones anawerengera kuti kuchepetsa mpweya wa CO2 ndi tani imodzi kumapulumutsa pakati pa $600 ndi $700.
"Anthu aku America amataya pafupifupi gawo limodzi mwa magawo atatu a chakudya chomwe amagula ndikudya ma calories 30% kuposa momwe amavomerezera," akutero Jones. "Kwa anthu aku America, kugula ndi kudya zakudya zochepa kungachepetse mpweya woipa kuposa kungodula nyama."