Today’s Solutions: December 17, 2025

How Finland’s giant sand

How Finland's giant sand battery is storing clean energy (and cutting emissions by 70 percent)

BY THE OPTIMIST DAILY EDITORIAL TEAM In a small Finnish town with a big climate goal, an unassuming tower of sand is quietly storing solar and wind energy all while making a powerful statement about clean tech innovation. Pornainen, in southern Finland, is now home to the world’s largest Read More...

Texas blends clean energy and

Texas blends clean energy and sustainable farming with the help of 6,000 sheep

BY THE OPTIMIST DAILY EDITORIAL TEAM As the United States accelerates its shift to renewable energy, Texas is pioneering an unusual approach that combines solar power generation and sustainable agriculture. This method, known as agrivoltaics, combines solar panels with agricultural practices to Read More...

Breakthrough in green hydrogen

Breakthrough in green hydrogen production: cobalt and water replace rare iridium

BY THE OPTIMIST DAILY EDITORIAL TEAM Hydrogen generation is frequently cited as a critical component in the shift to renewable energy. However, according to a paper published in Nature Energy by Kiane de Kleijne of Radboud University and Eindhoven University of Technology, the technique has Read More...