Rwizi rwaNire, rwumwe rwenzizi dzinonyanya kukosha kuvanhu, zvese zvakapfuura nanhasi, rwuri kudzikira nekusadzikira nekuda kweshanduko yemamiriro ekunze. Vamwe vanhu mazana mana emamiriyoni munyika dzese gumi neimwe vanovimba nazvo, asi ikozvino, maererano nezvakasiyana zvidzidzo, vachatora matanho akakomba ekudzivirira kusanaya kwemvura nemafashamo makuru..
Mvura dzayo, dzakakosha kwazvo muzvirimwa, dzakadzidzwa kubvira panguva yemafarao. Panguva iyoyo, akateedzana "nilometers" akavakwa kuti aone, kufungidzira uye kudzora saizi yemafashama egore. Asi nekushanduka kwemamiriro ekunze, izvi zvivakwa zvinogona kunge zvisina kukwana.
Huwandu hwevanhu huri kukura zvakanyanya. Pakazosvika 2050, inotarisirwa kupetwa kaviri mubheseni raNire, kubva pamamirioni mazana mana kusvika mazana masere, saka ikozvino kupfuura nakare kose vanovimba nerwizi. Nekuda kwekuenderera kuri kuunganidzwa kwe carbon dioxide mudenga, mvura zhinji ingangowedzera, zvinoreva kuti mafashama anowanzoitika.
Rwizi rwunokanganiswa nekutenderera kwekuchinja kwetembiricha muPacific: muna 2015, chiitiko cheEl Niño ndicho chakakonzera kusanaya kwakakomba kwakabata Egypt; gore rakatevera, La Niña rakakonzera mafashama makuru.
Kugadzirisa kuyerera kwerwizi yave iri nyaya yezvematongerwo enyika kwemakumi emakore, uye ikozvino zvave kuomarara sezvo nguva ichienderera uye tembiricha ichikwira. Vatsvakurudzi vakayambira kuti Middle East neNorth Africa inogona kuwedzera kusagadzikana; Kunze kwezvo, avhareji vhoriyamu yerwizi kuyerera inogona kuwedzera ne10-15%, uye inogona kuwedzera kusvika ku50%, kuitira kuti matambudziko awedzere zvakanyanya.
Kana iwe uchida kuziva zvakawanda, ita tinya apa.