Energy and Electricity - Introduction to Carbon Capture and Sequestration - page 38

conditions, we will use a high density of 2,800 kg/m 3 for our limestone
project. The thickness of the stone will vary from project to project, but
we will assume an average thickness of 4 inches (0.1016 m) for our
purposes.
Using these measures for the Hummer, we get:

3 2

1m 1m pavement

259,000 kg CaCO × ×

3

3

2,800kg CaCO

0.1016 m CaCO

3

3

2

= 910 m pavement

and for the Prius:

3 2

1m 1m pavement

72,500 kg CaCO × ×

3

3

2,800kg CaCO

0.1016 m CaCO 3

3

2

= 255 m pavement

In other words, it would take approximately 6.5 Hummers or 24 Priuses
to generate the carbon emissions necessary to pave an entire football
field (6,050 m 2 ) with limestone.

The professor, the plane, and the Prius

Question : Your Berkeley professors are likely to drive a Prius, but they are also very
proud of their United 1k Frequent Flyer status, which is a perceived signature of their
international importance. Does the carbon savings accrued by driving a Prius compen-
sate their flying habits?

Solution: Angus Ming Yiu Chan, Sirine Constance Fakra, Jeffrey Kaut Krajewski,
Yuguang She, and Zhou Lin.