In the past,The Biosphere was noe of the buidings from EXPO'

In the past,The Biosphere was noe of the buidings from EXPO'67.Nowadays,people can see it while sightseeing.It's a museum that educates people about climate change(温室效应),water,and plants and animals that live in the St-Lawrence river and the Great Lakes.
Name one building from Expo'67(67年的世博会) that still stands today.What is the huilding used for?
先读上面这段话,