By adding paraffin to plaster, these drywall boards are eco-friendly housing materials.

Researchers from the Polytechnic University in Madrid, Spain, have created a type of drywall that is able to reduce a building’s energy consumption by up to 40 percent. Unlike traditional wallboards that use pure plaster, the energy-efficient drywall consists of paraffin microcapsules in the mixture. The tiny beads of paraffin help the wall absorb heat during the day, and then release it at night. This helps the building stay cool when the sun’s out, and warmer when the temperature drops.

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