🔥 New Lesson: Sand Batteries — Storing Heat, Not Power

🔥

Did you know Finland keeps homes warm in winter using sand?Not magic—just clever engineering.

A simple silo filled with sand can store renewable energy as heat for months,then release it when the sun’s gone and the air outside freezes.

This lesson breaks down how it works and why it’s one of the most practical energy ideas for a warming and cooling world.

0 comments

skool.com/has2bgreen-3767

Learn, act, and lead on climate change: from basics to advocacy to real-world action. A global hub for solutions, stories, and change-makers.

Bring people together around your passion and get paid.