Astana: the Tent City

Tent over Astana

Plans have been unveiled in Kazakhstan to build a giant 150 meter high transparent tent over its capital Astana, essentially creating an indoor city!

From the BBC article:

Underneath, in an area larger than 10 football stadiums, will be a city with squares and cobbled streets, canals, shopping centres and golf courses.
The idea is to recreate summer, so that when the outside temperature is -30C, the residents of the Kazakh capital can play outdoor tennis, take boat rides or sip coffee on the pavement cafes.

I wonder if they’ll have any problems keeping the air fresh.