The University of Colorado Boulder’s newest residence hall, Kittredge Central, is welcoming students this week for the first time, 53 of whom are engineering students and will be immersed in Spanish through the building’s new Residential Academic Program, or RAP. Also, the nearby Kittredge West residence hall is reopening this week after being unoccupied last school year while renovations were underway. Both buildings comprise a number of “green” features to improve water and energy efficiency and to reduce the campus’s carbon footprint.