Electricity is just lost electrons trying to find their home. We trick them into working for us by yanking them out of their home and do things like oscillate things in the visible part of the electromagnetic spectrum (Lights), in the audbible portion(horn), pile up in a magnetic field until at the other end of the field they have a place to go (points closing) and they get in such a hurry they will jump across a gap (spark plug). We use special wires that slow electrons down by creating a type of friction kinda like rubbing your hands together and in the process convert the energy from slowing the electrons to heat. The cool thing is in the end no energy was lost it just changed it's state. Enviromentalism at it's finest.