sentence2: Since 2015, UNESCO has recognized Lake Tana as a World Heritage site for its unique ecological biosphere reserve, due to NABU's efforts to secure this status as part of its conservation efforts in the region.
sentence1: ከ2007 ጀምሮ፣ ዩኔስኮ ጣና ሐይቅ ለያዘው ልዩ የኢኮሎጂ እና ባዮስፌር ሀብት፣ ናቡ የተባለው ድርጅት በውስጡ ያሉትን ሀብቶች ለመጠበቅ እንዲያስችለው ባደረገው ጥረት፣ የዓለም ቅርስነት ዕውቅና ሰጥቶታል።