Image:
![A man leans over in a green grassy field to touch a small grassy plant](https://www.uoguelph.ca/ceps/sites/default/files/field_feature_image/mark-reusser-vice-president-of-the-ontario-federation-of-agriculture%20%281%29.jpg)
Summary:
Environmental Engineering Professor Rafael Santos discusses how to use products like recycled concrete, mining waste, or residue from making steel as an aggregate alternative.
Environmental Engineering Professor Rafael Santos discusses how to use products like recycled concrete, mining waste, or residue from making steel as an aggregate alternative.