Iimveliso ezininzi zeglasi ezazikhululekileyo ziye zafunyanwa kwimimandla yasentshona ye-China yakudala, ibuyela emva kweminyaka engama-2 000, kunye neemveliso zeglasi ezindala emhlabeni zineminyaka engama-4000 ubudala. Ngokutsho kwezinto zakudala, ibhotile yeglasi yeyona tyhefu egcinwe kakhulu emhlabeni, kwaye ayihambelani ngokulula. Iingcibi zithi iglasi ngudade wentlabathi yentlabathi, kwaye lo gama nje esemhlabeni, iglasi isemhlabeni.
Akunandaba nokuba iyonga ibhotile yeglasi, oko akuthethi ukuba ibhotile yeglasi ayibonakali kwindalo. Nangona ingenakutshatyalaliswa ngokuyintloko, inokuchithwa ngokwasemzimbeni. Umoya kunye namanzi endalo yi-nemesis yayo enkulu.
E Fort Bragg, California, United States, kukho unxweme olunombala. Xa uhamba, uyabona ukuba idityaniswe iibhola ezingenamibala. Ezi pellets azingamatye kwindalo, kodwa iibhotile zeglasi abantu abazilahla ngayo abantu. Kwiminyaka yee-1950s, isetyenziswe njengesixhobo sokulahla inkunkuma kwiibhotile zeglasi, kwaye emva koko isityalo esivinjiweyo, sishiya amashumi amawaka eebhotile ezishiywe, emva nje kweminyaka engama-60, zangemva kwamanzi olwandlekazi lwePasifiki kwaye zijikelezile.
Kwenye iminyaka eli-100 okanye ngaphezulu, unxweme lweglasi olubala luyanyamalala, izazinzulu zitsho. Ngenxa yokuba amanzi olwandle kunye nomoya ovuthuzayo ovuthuza umphezulu weglasi, ekuhambeni kwexesha, iglasi ikhutshiwe ngendlela yamasuntswana, kwaye emva koko ingeniswe emazantsi olwandle.
Unxweme oludadayo lusingela kuphela ukonwaba kuphela, kodwa kukukhokelela ekucingeni malunga nendlela yokuphinda isebenze kwakhona.
Ukwenzela ukuthintela inkunkuma yeglasi ukulungisa indalo esingqongileyo, thina sithatha iindlela zokurisayikili. Njengesinyithi esiyintloko sokuphinda sisebenze, iglasi ehlaziyiweyo ibuyiselwe kwiziko eliza kuphinda linyibilike. Kuba iglasi ingumxube kwaye ayinandawo yokunyibilika, iziko lisetelwe kumaqondo ohlukeneyo amaqondo omgangatho, kwaye icandelo ngalinye liza kunyibilika kwiglasi yeengoma ezahlukeneyo kwaye zahlule. Endleleni, ukungcola okungafunekiyo kunokususwa ngokongeza ezinye iichemicals.
Ukuphinda kusetyenziswelwe iimveliso zeglasi kwilizwe lam kwaqala emva kwexesha, kwaye ireyithi yokusetyenziswa imalunga ne-13%, i-lagn, i-lagn, i-Lagning Landise eYurophu naseMelika. Amashishini afanelekileyo kweli lizwe akhankanywe apha ngasentla sele eqolile, kwaye itekhnoloji yokuphinda isebenze kwaye imigangatho ifanelekile kwaye ifunde kwilizwe lam.
IXESHA LOKUQALA: Meyi-12 ukuya ku-1222