http://www.russiajournal.com/news/cnews-article.shtml?nd=40983

Imhol a szűkésges befektetések mértéke:
However, the development of reserves in the Yamal Peninsula and on the Arctic shelf requires huge investments. According to different estimates, $60bn to $140bn has to be invested in the development of oil and gas deposits in the area. Gazprom’s debt is currently about $15bn.

Tehá 60-tól 140 milliárd $ szükséges....