Some context: The Merchandise Mart (or the Merch Mart, or the Mart) is a commercial building located in the downtown Loop, of Chicago, Illinois, United States. When it opened in 1930, it was the largest building in the world, with 4,000,000 square feet (372,000 m2) of floor space. The art deco landmark is located at the junction of the Chicago River's branches. The building is a leading retailing and wholesale destination, hosting 20,000 visitors and tenants per day as of the late 2000s.
Under Chris Kennedy's leadership of the Mart, it was the largest building in the world to be awarded LEED (Leadership in Energy and Environmental Design) Certification in 2007 from the United States Green Building Council (USGBC). The Mart has long been implementing sustainable practices. The Mart Center began operating a thermal storage facility in 1986, capable of building 2,000,000 pounds (910,000 kg) of ice per night, cooling 71 buildings in the surrounding neighborhood, and saving $200,000 in electricity costs in the first year.  In 1990, the Mart Center began using Green Seal-approved green cleaning products and the next year implemented a recycling program, which today includes all forms of paper products, glass, light bulbs, batteries, aluminum and construction materials. In 1996, the Mart Center became one of the first major property owners in downtown Chicago to enter into an agreement with the district cooling system now known as Thermal Chicago, thus contributing to the national effort to reduce the discharge of ozone-damaging CFCs.  In 2006, MMPI joined Clean Air Counts, a voluntary initiative to reduce smog forming pollutants and energy consumption in the Chicago area. Part of the campaign strategies included utilizing only low VOC cleaning products, paints and building materials, as well as energy efficient lighting and alternative workplace transportation options. To date, the Mart Center has reduced pollution by 264,018 pounds (119,757 kg), the largest reduction by a commercial building.  That same year, the Mart Center recycling program saved over 13,000 trees and recycled nearly 11 million pounds of waste, while water conservation efforts saved 5.5 million US gallons (21,000 m3) of water. More than eight percent of the estimated 10,000 people working at the Mart walk, bike or take public transportation; to encourage greener methods of transportation, the Mart expanded bicycle storage capacity to more than 200. In 2009, MMPI converted all stationery to a one hundred percent post-consumer recycled product.  The Mart has nine LEED-certified showrooms, with five others on their way to LEED certification.
What kind of jobs do people work at in the mart?
A: 
Some context: Kathleen Deanna Battle (born August 13, 1948) is an American operatic soprano known for her distinctive vocal range and tone. Born in Portsmouth, Ohio, Battle initially became known for her work within the concert repertoire through performances with major orchestras during the early and mid-1970s. She made her opera debut in 1975. Battle expanded her repertoire into lyric soprano and coloratura soprano roles during the 1980s and early 1990s until her eventual dismissal from the Metropolitan Opera in 1994.
Among the conductors with whom Battle has worked are Herbert von Karajan, Riccardo Muti, Zubin Mehta, Seiji Ozawa, Claudio Abbado, Georg Solti, Carlo Maria Giulini, and Battle's fellow Ohioan James Levine, music director at New York's Metropolitan Opera. She has performed with many orchestras, including the New York Philharmonic, the Chicago Symphony Orchestra, the Boston Symphony Orchestra, the Philadelphia Orchestra, the Cleveland Orchestra, the Los Angeles Philharmonic, the Berlin Philharmonic, the Vienna Philharmonic, and the Orchestre de Paris. She has also appeared at the Salzburg Festival, Ravinia Festival, Tanglewood Festival, Blossom Festival, the Hollywood Bowl, Mann Music Centre Festival and the Caramoor Festival, and at Cincinnati May Festival.  In recital, she has been accompanied on the piano by various accompanists including Margo Garrett, Martin Katz, Warren Jones, James Levine, Joel Martin, Ken Noda, Sandra Rivers, Howard Watkins, Dennis Helmrich, JJ Penna, and Ted Taylor. Collaborations with other classical artists include flautist Jean-Pierre Rampal, soprano Jessye Norman, mezzo-sopranos Frederica von Stade and Florence Quivar, violinist Itzhak Perlman, baritone Thomas Hampson, tenors Luciano Pavarotti and Placido Domingo, trumpeter Wynton Marsalis and guitarist Christopher Parkening.  Away from the classical side, she has worked with vocalists Al Jarreau, Bobby McFerrin, Alicia Keys, and James Ingram, jazz saxophonist Grover Washington, Jr., jazz pianists Cyrus Chestnut and Herbie Hancock. Battle also lent voice to the song "This Time" on Janet Jackson's album Janet and sang the title song, "Lovers", for the 2004 Chinese action movie, House of Flying Daggers. She also performs the music of Stevie Wonder.
what other things did she do besides classical?
A:
jazz