As part of its promotional efforts for the 2016 Toyota Mirai fuel-cell car, the company has been working to demonstrate the myriad ways it says hydrogen can be extracted from the environment in a sustainable way. RELATED: Second Toyota Mirai Video: Hydrogen Is Like First Oil Well The latest video in the carmaker’s “Fueled By Everything” series focuses on the rather unlikely process of turning leftover lemonade into hydrogen. Naturally for a video meant to…