<prompt> Translate the following text to EnglishKama ilivyoelezwa, sheria hiyo itaanza kutumika mwaka 2000 na hatimaye itasababisha kupunguzwa kwa zaidi ya asilimia 60 kwa oksidi za nitrojeni kutoka kwa magari ya kukokotwa.  <response>: The standards will take effect in the year 2000 and will ultimately result, according to EPA, in a more than 60-percent reduction in oxides of nitrogen from locomotives. 