The prose is very well written, but the point she makes proves how "thick" she is and how "thick" large chunks of the world's population are.
Electricity, unless produced by hydro-dams, wind or wave turbines, generates much more pollution than steam pr diesel locomotives through the conversion process. (A certain amount of energy will always be wasted in the energy conversion process.) Power stations either burn fossil fuels or use the energy stored in nuclear fuel rods - the spent uranium or plutoneum rods must then be disposed of.
The electric trains themselves may be clean (and in the large cities, that is a real bonus) but the place where the electricity is produced can be a living hell - until 2008 when work began to transform it, the smoke from Drax power station near Doncaster could be smelt from 50 miles away!