Will paper mill sludge or cheese whey soon power your travel across America’s highways?  Well maybe not tomorrow, but a recent breakthrough at the University of Wisconsin could one day allow scientists to convert organic waste into hydrogen fuel using inexpensive metals like nickel, tin, and aluminum. According to the Environmental News Network, the Wisconsin researchers were able to use these metals to separate hydrogen from a waste mixture rich in glucose.  Hydrogen, of course, burns cleanly, and there is an almost limitless supply.  But a major technical problem has been finding a cheap way to separate hydrogen from other compounds, and experts believe this new finding may pump up the prospects for hydrogen power.