<prompt> Translate the following text to SwahiliIn many urban areas, NOx emissions from cars, trucks, and power plants contribute to winter time brown cloud situations.  <response>: Katika maeneo mengi ya mijini, uzalishaji wa NOx kutoka kwa magari, malori, na mitambo ya umeme huchangia hali ya mawingu ya kahawia wakati wa majira ya baridi kali. 