https://www.interez.sk/chlapec-v-afrike-postavil-z-odpadkov-veternu-turbinu-zabezpecil-tak-energiu-a-vodu-pre-dedinu/william_kamkwamba_at_ted_in_2007/ byť smart je interez Thu, 08 Aug 2019 08:47:38 +0000 hourly 1