There is a huge difference between energy production at an internal combustion engine and that at a power plant. Power plants are far far more efficient. Even i

There is a huge difference between energy production at an internal combustion engine and that at a power plant. Power plants are far far more efficient. Even if they do use fossil fuels. An ice wastes most of the fuel energy into heat. At the large scale of a power plant you can capture and use most heat and can perform much better exhaust cleaning. Furthermore, most of the new power generation in the US is expected to be natural gas and solar and both of these are cleaner than gasoline.