<prompt> Translate the following text to EnglishHatua hizo zimekuwa muhimu kwa mafanikio ya Programu ya Mvua ya Asidi, kuhamasisha vyanzo vya mtu binafsi kupata njia bora zaidi ya gharama ya kufuata lengo la kupunguza uzalishaji wa pamoja.  <response>: Such provisions have been critical to the success of the Acid Rain Program, encouraging individual sources to find the most cost-effective means of compliance with the collective emission reduction goal. 