Based on the clue 'covering 29 acres the worlds largest office buildi...', what is the answer?

What is associated with: covered in 2004 a little bit? Based on the clue 'covered mostly by an inland icecap the worlds larg...', what is the answer? Based on the clue 'covered with skins its a traditional eskimo boat f...', what is the answer? Based on the clue 'covering 2 of the earths surface theyre disappeari...', what is the answer? Based on the clue 'covering 625 square miles its louisianas largest l...', what is the answer? Based on the clue 'covering a lot of ground this greek counterpart of...', what is the answer? What is associated with: covering almost 30000 square miles this country consists of the northern third of the island o… Based on the clue 'covering combat military subjects its the journal...', what is the answer?