Promoting sustainable use of exposition venues, pavilions

Since 1851, when London held the first world exposition themed on the "Industry of all Nations", more than 100 world expos have been held.

But the continued use of the expo venues after the events and the concept of sustainable exhibitions are relatively new.

Most of the structures from more than 160 years of expos were temporary and were taken down after the events closed. Only a number of landmark buildings or structures from several fairs were notable exceptions.