Two years ago, former SpaceX engineers used rocket tech to develop a power plant capable of removing carbon dioxide from the atmosphere, with a small asterisk. To draw down CO 2 , it burned plant waste, making it a sort of “vegetarian rocket engine” for the grid. This week, Arbor Energy said it had raised a $55 million Series A led by Lowercarbon Capital and Voyager Ventures on the heels of a partial pivot. Its power plant, rather than sticking to a strict vegetarian diet, is going to be more