Finnish startup Polar Night Energy has figured out how to store renewable energy in… sand.
Here’s why it matters:
1️⃣ Stores excess wind & solar as heat for months
2️⃣ Can warm homes, offices, even swimming pools
3️⃣ Uses cheap, abundant, and recyclable material
Why is this a big deal?
Because storing green energy for the dark, windless days has been one of the biggest bottlenecks in the clean energy transition.
This might be the missing piece.
Would you trust sand to power your winter?
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Credit: eco.medy
