Electricity consumption is one of the biggest problem for the world economy. Today trains all over the world run on electricity power and they must be consuming massive amounts of electricity. Earlier there used to be steam locomotives/engines which would use coal to run the trains. These massive locomotives were slow to heat up but when they were heated up these locomotives would run at high speed non-stop. There is excess/abundent coal supply in this world and they are cheap. Bring back steam locomotives/engines for world trains. People who need fast travel they can always travel by planes.