ASU Researchers Break Solar-cell Efficiency Record at 25.4 Percent https://t.co/tmEXy18Gjq https://t.co/97dZV6PHY4
— Quality Roofing Pros (@QRoofingPros) January 14, 2019
from Twitter https://twitter.com/QRoofingPros
January 14, 2019 at 11:54AM
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