Mpweya wakuda ndi chinthu chomwe chimapezeka ndi kuyaka kosakwanira kapena kuwonongeka kwamafuta pansi pa mpweya wosakwanira.Amagwiritsidwa ntchito popanga inki, utoto, ndi zina zambiri, komanso amagwiritsidwa ntchito ngati kulimbikitsa mphira.