ABSTRACT
Sulfur dioxide, particulates and, to some extent, nitrogen dioxide are appropriately classified as non-uniformly mixed assimilative pollutants. 1 If the resulting allocation of control responsibility for these pollutants is to be cost-effective, the theory reviewed in Chapter 2 is convincing on the need for control authorities to consider where pollutants are injected into the air as well as how much. Unfortunately, introducing source location into the policy design complicates matters; it is easier said than done. It is not surprising, therefore, that not a single operating air pollution emissions trading program follows the ambient permit model.
