The opportunity provided by the use of glass in concrete is a potential solution that uses circular economy principles to unlock value and create new business  opportunities: first, by finding a use for glass of higher value than landfill, and second by decreasing the negative externalities of the construction sector.  By using glass in concrete, it would be possible to: 
*Re-utilize the 8 million tons of post-consumer glass that is landfilled each year.
*Reduce the 90-million-ton annual demand for cement, whose production leads to 90 million tons of  emissions (equivalent to nearly 20 million cars).
*Minimize exposure to heavy metals and other potentially toxic components in concrete – especially during the renovation and demolition of buildings.