Scientists from Vanderbilt and George Washington universities have worked out a way to make electric vehicles not just carbon neutral but carbon negative by demonstrating how the graphite electrodes used in the lithium-ion batteries can be replaced with carbon recovered from the atmosphere. (Perdón no tengo tiempo ahora mismo para traducirlo)
https://www.youtube.com/watch?v=AH5mAPcUbHE&feature=youtu.be