Yikuphi kwalokhu okulandelayo okungamandla avuselelekayo futhi yikuphi okungokokokushiswa kwamafutha: igesi yemvelo, amandla omoya, amandla kagesi wamanzi, ama-oil shale, amandla elanga, amalahle, nophethiloli.
Amandla amanzi, amandla elanga, amandla omoya abhekwa njengamandla avuselelekayo. Amalahle, uphethiloli, igesi yemvelo, nama-shale kawoyela kuchazwa ngokuthi amafutha emvelo.