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I see that the source article carefully avoids mentioning hydrogen. Running a car on hydrogen is insanely stupid. First off, it isn't 'green' in any meaningful sense of the word -- it isn't really even a fuel; it's just a grossly inefficient storage mechanism. Commercial hydrogen is produced by methane reduction (because that's much cheaper than electrolysis), so it is a fossil-fuel derivative.

For GM -- a company drowning in red ink -- to pursue such a vehicle means that we can expect not to see them to either go out of business soon, or get a massive government bailout. I'd rather see them go out of business.

Political Correctness makes for lousy science, bad economics, and even worse public policy.

Anyone who is interested in General Motors past electric car pursuit, I highly recomend they see the movie WHO KILLED THE ELECTRIC CAR

Hyrogen is currently produced is large quantities all over the world for industrial use. H2 production is a $60 billion industry.

The primary issue is not the environment. The larger picture should be well understood by everyone when they put gas in their car or pay their electrcity bill or express concern over our military activities in the Middle East. It is access to domestically controlled sources of energy.

The opportunity to choose our international obligations based on ideals instead of need, the rejuvination of American manufacturing industries and the retention of more than $600 billion in annual energy/fuel import costs are the prime issues. The outstanding net environmental issues are just a big plus.

The current cost of hydrogen, when used in fuel cell vehicle application is approx $30 to $48 per tank (6 kg.) That will power a car like the new Cadillac Provoq 300 miles, or the Honda Clarity 270 miles, each with a top speed of 100 mph, with a fuel price that is less per mile driven than gasoline.

Hydrogen has been safely handled and stored for more than a century.

There are many ways to make hydrogen including Steam Methane Reforming (using natural gas or methane from landfills), Electrolysis (breaking apart water with electricty from wind, solar and nuclear power facilities), Gasification (coal, wastes), reverse SOFC (solid oxide fuel cell), etc.

Sooner than you think, hydrogen powered fuel cell vehicles will be available. Sooner thsan you think, you'll want any alternative to petroleum.

Of course, Honda is currently taking orders for their hydrogen fuel cell/electric Clarity HFC sedan in southern California for $600/mo. including 3-year lease, maintenance and limited insurance. To solve the infrastructure/H2 supply problem, Honda has developed the hydrogen-from-natural-gas Home Energy Station -- which also provides co-generation heat and electricity to the home. Total emissions savings for the home and car is in the order of 30% according to Honda.