Alstom, a French firm, has almost finished building one in Wisconsin that uses ammonia.

ECONOMIST: A survey of The future of energy: Dig deep | The

What at first glance appears to be a jumble of boulders was probably a workshop where expert stonecutters practiced their trade. (One chunk of granite has been carved into almost-finished steps.) Another large stone, known as Serpent Rock, has snakes etched into its top surface.

BBC: What most people miss at Machu Picchu

Their NI 43-101 has been completed and updated and they finished almost a year ago the next requirement in the chain, the PEA (preliminary economic assessment).

FORBES: How Arizona Is Helping America Reduce Dependence On Foreign Natural Resources