Pẹlupẹlu, iwadi naa ṣe ayẹwo awọn eroja ọja pataki, ibora idiyele, oṣuwọn lilo agbara, oṣuwọn idagbasoke, agbara, iṣelọpọ, apapọ, lilo, owo-wiwọle, okeere, ipese, idiyele, ipin ọja, ala nla, agbewọle, ati ibeere.Ni afikun, iwadi naa nfunni ni kikun ipin ti agbaye…
Ka siwaju