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Yes I expect to see a return to coal fired Transoceanic ships with in my life time, trains possibly and coal heating if the price of natural gas doesn't stay low.
But I expect natural gas to stay affordable for around 50 years, the main way natural gas would become unaffordable is with a huge increase in deman.
Trains may stay diesel electric with the addition of over head power.
2050+ trains would probably be coal steam turbine electric, not steam piston direct drive like in the Victorian age.
I think I mentioned "saving the world" in the op.
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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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