Revolutionizing Prosthetics 2009 program, relies on a modified miniature version of the same rocket motors the space shuttle uses to reposition itself in space: hydrogen peroxide is burned in the presence of a catalyst to produce pure steam, which is then used to move the arm.

ENGADGET: Rocket-powered mechanical arm might boost prosthetic tech

In short, Steam trades are not always pure exchanges happening in some moral-free zone where social obligations are perceived to be non-existent.

FORBES: Virtual World Needs Laissez-faire Economists

To keep turbine sales spinning, Immelt has turned to a process that partially burns pulverized coal in the presence of pure oxygen to turn it into a flammable gas that can drive linked gas and steam turbines.

FORBES: On The Cover/Top Stories