Poyamba, munthu sangazindikire kugwirizana pakati pa kudya nyama ndi mavuto aakulu a chilengedwe monga kutentha kwa dziko, kukula kwa chipululu, kutha kwa nkhalango zotentha ndi kugwa kwa mvula ya asidi. Ndipotu, kupanga nyama ndilo vuto lalikulu la masoka ambiri padziko lonse. Sikuti gawo limodzi mwa magawo atatu a dziko lapansi likusintha kukhala chipululu, komanso kuti minda yabwino kwambiri yaulimi yagwiritsidwa ntchito kwambiri moti ayamba kale kutaya chonde ndipo sadzaperekanso zokolola zazikulu chotero.
Kalekale, alimi ankasinthasintha minda yawo, ankalima mbewu zosiyanasiyana chaka chilichonse kwa zaka zitatu, ndipo m’chaka chachinayi sankafesa n’komwe. Iwo adayitana kuti achoke m'mundamo "ulimi". Njira imeneyi inkathandiza kuti mbewu zosiyanasiyana zizidya zakudya zosiyanasiyana chaka chilichonse kuti nthaka ikhale yachonde. Popeza kuti pambuyo pa kutha kwa Nkhondo Yaikulu Yosonyeza Kukonda Dziko Lako chifuno cha chakudya cha zinyama chinawonjezereka, njira imeneyi pang’onopang’ono inasiya kugwiritsidwanso ntchito.
Tsopano alimi nthawi zambiri amalima mbewu yomweyo m’munda womwewo chaka ndi chaka. Njira yokhayo yotulukira ndiyo kukulitsa nthaka ndi feteleza zopangira ndi mankhwala ophera tizilombo - zinthu zomwe zimawononga udzu ndi tizilombo. Mapangidwe a nthaka amasokonezedwa ndipo amakhala osasunthika komanso opanda moyo komanso amatha kupindika mosavuta. Theka la malo onse aulimi ku UK tsopano ali pachiwopsezo chokokoloka kapena kukokoloka ndi mvula. Pamwamba pa zonsezi, nkhalango zimene poyamba zinkakhala m’zilumba zambiri za British Isles zadulidwa moti zatsala zosakwana ziŵiri peresenti.
Maiwe opitilira 90%, nyanja ndi madambo atayidwa kuti apange minda yambiri yolimako chakudya cha ziweto. Padziko lonse zinthu zili ngati zofanana. Manyowa amakono amachokera ku nayitrogeni ndipo mwatsoka si feteleza onse omwe alimi amagwiritsa ntchito amakhalabe m’nthaka. Ena amakombwa m’mitsinje ndi m’mayiwe, kumene nayitrogeni angayambitse maluwa oopsa. Izi zimachitika pamene ndere, zomwe nthawi zambiri zimamera m'madzi, zimayamba kudya nayitrogeni wochulukirapo, zimayamba kukula mwachangu, ndikutsekereza kuwala kwadzuwa ku zomera ndi nyama zina. Duwa loterolo limatha kugwiritsa ntchito mpweya wonse wa m’madzi, motero kuwononga zomera ndi nyama zonse. Nayitrojeni amatheranso m’madzi akumwa. Poyamba, anthu ankakhulupirira kuti zotsatira za kumwa madzi odzaza ndi nayitrogeni zinali khansa komanso matenda a ana obadwa kumene omwe maselo ofiira a magazi omwe amanyamula mpweya wa okosijeni amawonongeka ndipo amatha kufa chifukwa chosowa mpweya.
Bungwe la British Medical Association lati anthu a ku England okwana 5 miliyoni amamwa madzi omwe ali ndi nitrogen yambiri. Mankhwala ophera tizilombo nawonso ndi oopsa. Mankhwala ophera tizilombo ameneŵa amafalikira pang’onopang’ono koma motsimikizirika kupyolera mu ndandanda ya chakudya, kukhala mochulukirachulukira, ndipo akalowetsedwa, amakhala ovuta kwambiri kuwachotsa. Tangoganizani kuti mvula imatsuka mankhwala ophera tizilombo m’munda n’kulowa m’madzi oyandikana nawo, ndipo ndere zimatenga mankhwala m’madzi, nkhono zazing’ono zimadya ndere, ndipo tsiku ndi tsiku poizoniyo amaunjikana m’kati mwa matupi awo. Kenako nsombayo imadya kwambiri nsomba zakuphazo, ndipo chiphecho chimachuluka kwambiri. Zotsatira zake, mbalameyi imadya nsomba zambiri, ndipo mankhwala ophera tizilombo amakhala ambiri. Chifukwa chake zomwe zidayamba ngati njira yofooka ya mankhwala ophera tizilombo m'dziwe kudzera muzakudya zitha kukhala zochulukirapo nthawi 80000, malinga ndi British Medical Association.
Nkhani yofanana ndi ya nyama zapafamu zomwe zimadya chimanga chopopera mankhwala ophera tizilombo. Poizoniyo amaunjikana m’minyewa ya nyama ndipo amakula kwambiri m’thupi la munthu amene wadya nyama yapoizoni. Masiku ano, anthu ambiri ali ndi zotsalira za mankhwala ophera tizilombo m’matupi awo. Komabe, vutoli ndi lalikulu kwambiri kwa odya nyama chifukwa nyama ili ndi mankhwala ophera tizilombo kuwirikiza ka 12 kuposa zipatso ndi ndiwo zamasamba.
Buku lina la ku Britain loletsa mankhwala ophera tizilombo limati "Chakudya chochokera ku nyama ndicho gwero lalikulu la zotsalira za mankhwala ophera tizilombo m'thupi." Ngakhale kuti palibe amene akudziwa bwino lomwe mmene mankhwala ophera tizilombo ochuluka ameneŵa amatikhudzira, madokotala ambiri, kuphatikizapo mamembala a British Medical Association, ali ndi nkhaŵa yaikulu. Iwo akuopa kuti kukwera kwa mankhwala ophera tizilombo omwe amaunjikana m’thupi la munthu kungachititse kuti munthu adwale matenda a khansa komanso kuti chitetezo cha m’thupi chichepetse.
Bungwe la Institute of Environmental Toxicology ku New York lati chaka chilichonse anthu oposa 20000 miliyoni padziko lonse amadwala mankhwala ophera tizilombo ndipo XNUMX mwa iwo amafa. Mayesero omwe anachitidwa pa ng'ombe ya ku Britain asonyeza kuti awiri mwa asanu ndi awiri ali ndi mankhwala a diheldrin opitirira malire omwe bungwe la European Union linapereka. Diheldrin amaonedwa kuti ndi chinthu choopsa kwambiri, monga momwe bungwe la World Health Organization linanena, lingayambitse zilema ndi khansa.