When 500 phone books are recycled, which of the following statements is false?

a.

conserves around 9 cubic yards in landfill space

b.

conserves around 17-31 trees

c.

conserves around 4,077 kilowatt hours of energy

d.

conserves around 463 gallons of oil

The first statement, "conserves around 9 cubic yards in landfill space" is false. This is because the units of landfill space are inconsistent with the quantity. "Space" would be the area in this case and that would be measured in square yards, not cubic yards.

The remaining quantities' units are consistent with what they represent (b is number of trees, c is energy, and d is volume)