The steam locomotive was invented some time before this. But, in order to understand the impact human activity has on a benevolent Earth one has to understand that it is 'consumerism' and the mass use of inventions that cause the dramatic shift in climate and unreasonable Global Warming.
The inventions alone don't cause the warming. The consumer use of invention in mass number causes the warming.
The Pullman Coach was the commercial/consumer use of the railroad. People could now be transported from one place to another with the use of rail cars. It became very popular and somewhat of a status symbol.
