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. For a material so vital to our cities, it's strange there is so little publicly available information about how much aggregate we use to build the various types of urban infrastructure we rely on.
- Pages
- 12
- Published in
- Canada
