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Counterprogramming with good news:

"From India comes the story of three teen inventors who were looking to improve rural healthcare by creating a portable fridge that needed no electricity or coolant fluids.

The result of their inspiration is a small, salt-cooled fridge that needs neither a power outlet nor a battery, but rather cools down passively as the salts dissolve in water.

Calling it “a fridge to bridge the world,” the Thermavault can use different combinations of salts to keep the contents at temperatures just above freezing or below it. Some vaccines require regular kitchen fridge temps, while others, or even transplant organs, need to be kept below freezing, meaning this versatility is a big advantage for the product’s overall market demand.

Dhruv Chaudhary, Mithran Ladhania, and Mridul Jain are all children of physicians or medical field workers in the state of Indore. Seeing how difficult it was to keep COVID-19 vaccines viable en route to countryside villages hours outside city centers in tropical heat, they wanted to create a better, portable solution to keeping medical supplies cool.

Because salt molecules dissolve in water, the charged ions that make up the salt molecules break apart. However, this separation requires energy, which is taken in the form of heat from the water, cooling it down."

https://www.goodnewsnetwork.org/teens-win-2025-earth-prize-for-refrigerator-that-runs-on-salt-200-headed-to-hospitals-for-chilling-medicine/

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