A coal-fired power plant produces power with costs .
Each unit of power earns the plant . Burning coal releases
particulate matter (PM2.5), a pollutant that is known to cause
heart disease, lung disease, and birth defects. The coal plant
borders a wildlife sanctuary which sells tourism
visits for a price $30. However, the sanctuary's animals
are getting sick due to the negative externality of PM2.5, such
that the costs to the sanctuary are . The local government decides
to tax the...