Today’s Solutions: November 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...

Volcanic ash may be a game cha

Volcanic ash may be a game changer in sustainable solar energy storage solutions

When calamity hits and volcanic ash blankets the land, it is commonly perceived negatively, for many obvious reasons. However, novel research from the University of Barcelona demonstrates that this seemingly gloomy substance has enormous promise as an energy storage medium, providing a Read More...