<prompt> Translate the following text to EnglishKuruhusu vyanzo kufanya kupunguzwa ambapo ni zaidi ya kiuchumi kufanya hivyo ni moja ya sababu cap na biashara mipango inapaswa kuwa chini ya gharama kubwa kuliko amri na udhibiti mipango ambayo kufikia sawa au hata chini kupunguzwa.  <response>: Allowing sources to make reductions where it is most economical to do so is one of the reasons cap and trade programs should be less costly than command-and-control programs that achieve the same or even fewer reductions. 