The idea to have electric car batteries feed into the power grid is quite stupid. I generally see the creation of electric cars to be catastrophic to the eco system, considering the rare materials that are excavated in the process.,(reply>), Care are not a viable option for the future. The electric car is not an answer to our problems, well implemented public transport is the only viable solution.,(reply>), Not remotely as bad as mining and burning fossil fuels.<br><br>Not only are they not as bad, but you also need MANY  orders of magnitude less rare earths than you do fossil fuels.<br><br>And rare earths are completely recyclable(and they're already working on building recycling plants), whereas fossil fuels are used once and more has to be mined and shipped.<br><br>Not to mention that fossil fuels release  a LOT of bad things into the air, land, and water. Things like poisonous chemicals, heavy metals, AND radioactive elements.