One person's trash is another person's treasure. 

Or at least that's how Gil Yaron describes the concept of a new exchange program on Vancouver Island, which allows construction companies to sell or swap leftover job site materials, rather than sending them to the landfill. 

Yaron is the managing director of circular innovation at Light House, a Vancouver-based non-profit organization focused on increasing sustainable practices in the construction sector. The Building Material Exchange program (B…