Dell was among the most praised companies last week, as it announced new sustainability initiatives among which carbon-negative packaging, through a partnership with Newlight Technologies, inventor and manufacturer of AirCarbon. Walmart is collaborating with Kellogg Company to support the livelihoods of rice growers and sustainable rice-growing practices worldwide. Volkswagen has earned the World Environment Center's (WEC) 30th Anniversary Gold Medal award for its comprehensive commitment to environmental preservation and eco-mobility. Whole Foods Market earned the top spot in Greenpeace's annual seafood sustainability ranking of U.S.supermarkets. MGM Resorts International has announced that it is joining the US Energy Department's Better Buildings Challenge, a national pledge calling for organizations to voluntarily reduce their building portfolio energy use by 20 percent in ten years.