The company vows to double its revenues from 17 clean-technology businesses, ranging from renewable energy and hydrogen fuel cells, to water filtration and purification systems, to cleaner aircraft and locomotive engines.

ECONOMIST: The greening of General Electric

Hydrogen produced from renewable resources is a promising source of clean energy, but the gas is difficult to handle and transport.

BBC: Hydrogen's energy promise improves

The energy storage system will produce hydrogen using excess power generated from renewable energy, primarily wind power.

FORBES: Connect

So when millions of buildings are collecting distributed renewable energy, storing it in the form of hydrogen like we store media in digital form, they can then share any surplus electricity with others by selling back onto the energy Internet.

FORBES: Jeremy Rifkin's Third Industrial Revolution

"Economics dictates that 95% of current U.S. hydrogen is produced by steam-methane re-forming of non-renewable natural gas, " Michael K. Heiman, professor of environmental studies at Dickinson College, wrote in a study of the proposed hydrogen economy last year.

FORBES: Magazine Article