የፀሐይ ኃይል ዓለም አቀፍ ተፍላጊነትና ተቀባይነትTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoTekle Yewhala6 ጥር 2007ረቡዕ፣ ጥር 6 2007https://p.dw.com/p/1EKbmማስታወቂያ