A zero-power fabric sunshade keeps car cabins up to 17.8 °C cooler under the summer sun
The fabric sunshade that keeps a parked car's cabin up to 17.8 °C cooler draws no power at all. Researchers wove a hierarchical metafabric that reflects 94.3% of sunlight and emits 95.8% of the mid-infrared radiation that carries heat away, while fluorescent particles…