https://www.sciencedaily.com/releases/2020/08/200827150957.htm > The system, which uses memristors to create artificial neural networks, is at least 1,000 times more energy efficient than conventional transistor-based AI hardware, but has until now been more prone to error. > Existing AI is extremely energy-intensive -- training one AI model can generate 284 tonnes of carbon dioxide, equivalent to the lifetime emissions of five cars. Replacing the transistors that make up all digital devices with memristors, a novel electronic device first built in 2008, could reduce this to a fraction of a tonne of carbon dioxide -- equivalent to emissions generated in an afternoon's drive.