The case for replacing most air travel with high speed, composite airplane like trains that fly in tubes built in freeway median strips.  More than enough renewable electricity to power them can come from solar panels mounted on the tubes.  This would save huge amounts of GHG from car and air travel.

http://gristmill.grist.org/story/2008/3/21/15816/8754#40

Amtrack isn't exactly a great example.
Gee, maybe running passenger trains on freight train tracks is 19th century technology?  

Real high speed rail, running on solar panels mounted on a tube in the median of freeways.  Aluminum and composite trains that fly in the tube at over 200 mph.

Maybe that's 21st century technology?  

I wonder why lobbyists for auto and airline industries would gobble up all the tax breaks and block every innovation that they can?  Leaving passenger train technology to die off of neglect?

Because that's free marketeerian corporate governance.  De-regulation.  

Yeah, obviously travelors are choosing planes over trains.

Because there isn't an alternative.  Because it's been snuffed out by corporate lobbying.  How can travelors choose high speed trains that aren't there?

I got another nightmare for corporate "citizen" airline industry conglomerates.

How about high speed trains bridging the oceans, with a few tubes underwater here and there between the continents?  Could high speed trains even "fly" at over 300 mph in tubes?

Aircraft fly at much higher speeds, why not aircraft in tubes, cushioned by air pressure between the tube and the train?  It's perfectly feasible, and renewable electric powerable.

Cancel gas guzzling air travel and develop plugin hybrid air travel instead.  Batteries theoretically can match liquid fuel energy density and will do it someday in reality.

Gas turbines are under 20% efficient.  Electric motors over 90%.  Energy for takeoff can be transferred to aircraft via tuned induction along the runway.  Hybrid fuel cell/turbines could power takeoffs using 10% of the normal fuel.

Why not phase out old gas guzzling air travel in favor of renewable electric trains specially designed to carry passengers and air freight.  Then work on new renewably powered aircraft with better battery, inductive power transfer, and fuel cell/turbine engine techologies.  It's real economy stimulating, GHG free investment.  

Kids graduating college would have jobs again.  And not want to "volunteer" to join a bush oil war team near them.