Ɗaya shine don tantance babban gazawar abubuwan muhalli ta hanyar siffanta ainihin yanayin amfani (kamar zafin jiki, matsa lamba, zafi, feshin gishiri, tasiri, rawar jiki, yanayin amfani da waje na yanzu, musamman tasirin caji-fitarwa).Wani kuma shine don tantancewa da tabbatar da abubuwan da aka tsara...
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