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The Greater Toronto Area (GTA) is literally made of stone, sand and gravel, collectively known as aggregate. Aggregate is in the cement we use to make sidewalks, bridges, large buildings, sewers, the foundations of our homes, and the underground tunnels for subways, cars, and pedestrian walkways.  Large amounts of aggregate are also used to make our roads, both the beds on which they sit and the asphalt we use to pave them. Put simply, aggregate is everywhere.

According to industry estimates, the GTA will use about 1.5 billion tonnes of aggregate over the next 25 years.

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