By 2040, there will be 559 million electric vehicles (EVs) on the world’s roads, vastly reducing the transport sector’s carbon footprint, which currently accounts for about a quarter of global emissions, and significantly increasing the amount of variable wind and solar power that can be absorbed by the grid.

Each EV has a large battery that will be plugged into the electricity network for an average of 90-95% of each day, able to store electricity when the supply of wind and solar power is greater than demand, and send power back to the grid when demand is greater than supply.