EcoNet News, Volume 25, Issue #1, features an essay on solar power and its vast, largely untapped potential; sustainable aviation fuels; the use of hydrogen for conventional jet engines and in fuel cell configurations; UGES – Underground Gravitational Energy Storage; EV updates on Sony, Tesla in Germany, and Hertz; the Floating Offshore Wind Shot; as well an article on regulating America’s last common form of pollution, cigarette butts and their cellulose acetate filters.