From official Toyota's press release: 4. FCV-R (world premiere) A practical sedan-type next-generation fuel-cell concept vehicle fueled by hydrogen, a promising source of CO2 emission-free energy that can be produced from a variety of sources and can be easily stored and transported.  This concept model is a highly practical fuel-cell vehicle (FCV) that is planned for launch in about 2015. With the fuel-cell unit located beneath the…