<prompt> Translate the following text to SwahiliThe marginal cost of carbon reductions range from 46 to 138metric ton through 2015 with each scenario showing successively smaller costs as technology characteristics improve and more energy-efficient andor low carbon technologies penetrate the market.  <response>: Gharama ya chini ya kupunguza kaboni inatofautiana kutoka 46 hadi 138 kwa tani ya metrik hadi 2015, na kila hali inaonyesha gharama ndogo zaidi kwa sababu sifa za teknolojia zinaboresha na teknolojia za nishati na chini ya kaboni zinaingia sokoni. 