Uharibifu misitu ,ufugaji wa ng'ombe na kilimo cha kupindukia vimekua vyanzo vikuu vya Kuongezeka Majangwa.
Makala hii kuhusu "Kuongezeka Majangwa" ni fupi mno. Inahitaji kupanuliwa mapema. |
Udongo unapokua mkavu,hwa huru kwa upepo ambao huuchana udongo wa juu na kuusambaratisha. Ardhi za vilimo mwanzo zilikua zikizalisha zimekua tasa na hupoteza mandhari zake. Kisha jangwa hutanuka na kuteka ardhi.
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