Mu myaka 20 ishize, twubatse metero zirenga miliyoni 2 za parike yubuhinzi n’ubuhinzi n’ubuhinzi n’abakiriya mu Burayi, Amerika, Aziya yo hagati ndetse n’utundi turere, tubafasha kugera ku ntego yo kongera umusaruro no kugabanya ibiciro by’umusaruro.