Emission control hit the forklift business about 2004, We new it was coming, but it's a good thing. INDOOR air quality has become a concern as well as OUTDOOR air---LP GAS has been the fuel of choice for years because of it's cleaner burning properties especially for indoor applications and situations where lifts will be used outside to bring materials inside. Electric trucks do not like water and are not generally used outside. Forklifts from 2004 have "cleaner burning" engines and if not mistaken 2007 forklifts are now EMISSION COMPLIANT as per C.A.R.B. (California-Air- Research-Board ) for US built units. Electric equipment is very common for "Food " handling and processing, medical supply and manufacturing and places where they have "clean rooms " anywhere cleanliness is an issue and also freezer applications. Keep watching and partcipating in the Forums there are many experienced folks "LURKING" in the background that use these forums who you can learn from.