Solar heater made from can lids will boil a jar of water

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Recycling can lids can turn into a heated situation.

It takes two hours on a sunny day, but this solar heater built by engineering students at Humboldt State University in California works. It’s made from waste materials, specifically can lids. These are held together by vines from Himalaya blackberry plants, which are an invasive species in their area…

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