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 of an omnivore, capable of burning natural gas in addition to biomass.

The shift happened this year as electricity demand from data centers has boomed. The existing design was fully capable of powering AI servers, but its reach would be limited by sources of wood and agricultural waste. Natura

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