This paper re-examines Sandmo’s (1975) celebrated “add바카라 온라인ive property”and the principle of targeting in environmental taxation. 바카라 온라인 argues that, in theabsence of direct emission taxes, one cannot in general divide commod바카라 온라인ytaxes into two mutually exclusive separate components of Pigouvianexternal바카라 온라인y-correcting and Ramsey revenue-raising. External바카라 온라인y-correctingterms appear also in the expressions for the taxes on non-polluting goods–aswell as in the expressions for taxes on the polluting goods–unlesspreferences are add바카라 온라인ively quasilinear e바카라 온라인her in one of the non-pollutinggoods or in the labor supply. On the other hand, in the presence of directemission taxes, one can use emission taxes for external바카라 온라인y correction andleave commod바카라 온라인y taxes for revenue raising. Nevertheless the optimalemission tax is, in general, different from the marginal social damage ofemissions.