simasia den exei poses katigories exei i kathe xora alla poses energes omades se kathe mia apo tis katigories.emeis exoume v katigories opou stis opoies se oles yparxoun energes omades.stin germania mexri tin iv mporeis na freis tetoies.gia poio logo tis anoiksane afou akoma den yparxoun energes omades oute gia tin v den to ksero.