Electric car batteries could be used to boost power storage in the future, injecting electricity into the grid during times of scarcity or storing electricity during periods of excess, a new study found Tuesday. Renewable energy is essential for the Paris Agreement goal of limiting global warming to well below two degrees Celsius, but the need to scale up quickly and the intermittency of wind and solar have raised concerns about meeting electricity demand. One way to help solve this problem is boosting the storage capacity of electricity grids, so that even when there is no sun or wind energy...