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Hydrogen already is main stream. The oil industry produces millions of tons of hydrogen every year for hydro cracking of petro chemicals. It still remains difficult to store, transport and use.
The cost of hydrogen would likely go up if hydrogen went main stream since now almost all hydrogen is used to make other stuff. If hydrogen its self is the end product it would be add additional load to existing processes.
A fuel cell can supposedly last 30 to 100 years. The tech used in the Che y volt battery is probably going to allow the batteries to last at least 20 years.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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