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
If the city implements the sorting requirement, the sanitation department will stay within its budget.