Fekthering ea rona ea ho etsa ente, re sebetsa ka thata ho hlahisa litanka tsa metsi tsa polasetiki tse etselitsoeng ho finyella litlhoko tsa hau tse khethehileng. E entsoe ka thepa ea polasetiki ea boleng bo phahameng, e tšoarellang, litanka tsa rona tsa metsi li hahiloe ho mamella maemo a thata ka ho fetisisa, li fana ka ts'ebetso e tšepahalang bakeng sa lits'ebetso tsa bolulo le tsa indasteri.

Ka theknoloji e tsoetseng pele ea ho bōpa, re fana ka litharollo tse nepahetseng le tse theko e tlaase, ho netefatsa hore tanka e 'ngoe le e' ngoe e bobebe, e hana ho lutla ebile e tšoarella nako e telele. Re khethe bakeng sa litanka tsa metsi tsa polasetiki tse tloaelehileng tse kopanyang ts'ebetso, ho tšoarella, le tlhahiso e sebetsang hantle.