<prompt> Translate the following text to EnglishKupunguza uzalishaji wa oksidi za nitrojeni NOx kwa asilimia 67 kutoka uzalishaji wa sasa wa tani milioni 5 hadi kiwango cha juu cha tani milioni 2.1 mnamo 2008 na hadi tani milioni 1.7 mnamo 2018.  <response>: e? Cut emissions of nitrogen oxides NOx by 67 percent, from current emissions of 5 million tons to a cap of 2.1 million tons in 2008, and to 1.7 million tons in 2018. 