Mphamvu yamphepo yakhala imodzi mwazinthu zothekera zaukhondo padziko lapansi.Kwa zaka zambiri, magetsi athu ambiri ankachokera ku malasha, mafuta ndi zinthu zina.Komabe, kupanga mphamvu kuchokera kuzinthuzi kumawononga kwambiri chilengedwe komanso kuipitsa mpweya, nthaka ndi madzi.Kuzindikira kumeneku kwapangitsa anthu ambiri kutembenukira ku mphamvu zobiriwira monga yankho.