When applying the emission factors at the national level, we can see the tremendous potential for GHG
emission reductions. Exhibit 12 shows the current estimated concrete life-cycle GHG emissions assuming the
current waste disposal scenario, as well as the potential reductions if all of the waste concrete was recycled into
aggregate. As the exhibit shows, if all concrete was recycled, over 1 million MTCE would be avoided (i.e.,
-420,000 MTCE – 700,000 MTCE), equivalent to removing nearly 1 million cars from the road23 for a year.
Reliable data for current disposal and source reduction rates of clay bricks are unavailable; we were therefore
unable to conduct a similar analysis for clay bricks.