text:  Mike Roberts doesn't use gas in his home. His furnace, water heater, stove, and clothes dryer are all electric. He's become something of a home electrification and heat pump evangelist. But Roberts' pitch always lacked a little je ne sais quoi. So one day, the part-time musician, part-time music teacher, put pen to paper. If I'm generating ideas for a song, I'll sit and I will write down just phrases that