A new system can provide passive cooling without the need for power, and could be used to preserve food or vaccines in hot, off-grid locations.
from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2018/11/181128141714.htm
from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2018/11/181128141714.htm
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