Johns Hopkins University has implemented a significant number of sustainability initiatives.[34] Energy retrofits in certain buildings have resulted in energy conservation of over 50 percent.[35] Carbon emissions are currently being inventoried and electric vehicles are used for some campus transportation needs. Dining services managers prioritize the purchasing of locally sourced produce and seafood, and organic food is being integrated into the menu.[35] In addition, the smaller cafés around campus sell exclusively organic, shade-grown coffees. There is currently a small pilot composting program on the undergraduate campus.[35] The University is currently pursuing LEED certification for several new and existing buildings.[35] Retrofits include a green roof deck, experimentation with waterless urinals and low-flow shower heads, and upgraded fluorescent lighting that has reduced lighting load on one campus by over 40 percent. Similar lighting retrofits are underway at all other campuses. In 2004, one campus completed a water conservation retrofit that annually saves over eight million gallons of water.[35] The university's students have also contributed significantly to several environmental initiatives including, setting up the JHU recycling program, hosting a national "Greening" conference, launching a transportation shuttle service between campuses, and making the campus more bike-friendly.[34] In 2009, the Sustainable Endowments Institute named Johns Hopkins a Campus Sustainability Leader on its College Sustainability Report Card with a grade of "A-", the highest grade awarded.[36]