If the city starts requiring residents to sort the materials that they put out for recycling, then many residents will put more recyclables in with their regular garbage. This will result in more recyclables being buried in the city' s landfill. However, because of the cost of having city workers do the sorting, the sanitation department will not stay within its budget unless the sorting requirement for residents is implemented.
Implementing the sorting requirement would not cause the city's annual cost of sending garbage to its landfill to exceed its current annual cost of sorting recyclables logically follows from the information above.