<prompt> Translate the following text to SwahiliThe marginal cost of SO2 and NOx reductions through 2015 are less than 450 and 2,300ton, respectively, in all four multi-emissions reduction scenarios.  <response>: Gharama ya mwisho ya kupunguza SO2 na NOx hadi 2015 ni chini ya 450 na 2,300 kwa tani, kwa mtiririko huo, katika hali zote nne za kupunguza uzalishaji. 