Jersey Journal: A pioneering environmentally-friendly development in Downtown Jersey City is one step closer to fruition after the Jersey City Planning Board approved the final site plan on Tuesday. Van Leer Place will use 90 percent less energy than conventional buildings and emit fewer carbon emissions through geothermal and solar energy as well as other green technologies, said Daniel Gans who is developing the property with his partner George Vallone of the Hoboken Brownstone Company. Gans and Vallone…