Solar and wind power don't work all the time, and standard lithium batteries are expensive. We also need a way to use captured CO2 to help the planet instead of hurting it. Energy Dome built a giant battery in Italy that uses CO2. It turns the gas into liquid to store energy and back into gas to spinning a turbine for power. These batteries are cheaper to make and create zero emissions. They provide steady, clean electricity even when it is not sunny or windy.