Montreal company pioneers carbon-negative concrete

Cement production is one of the world’s leading sources of carbon dioxide emissions, accounting for as much as 10 per cent of global emissions, according to a 2014 study by the Netherlands Environmental Assessment Agency.
Most of that cement is used to make concrete.
While methods have been developed to reduce the amount of cement used in concrete, it’s still a necessary ingredient, binding the materials together.
But Mehrdad Mahoutian wants to change that.
He’s the p