Năng lượng mặt trời vào ban đêm
Các nhà khoa học Mỹ đã tìm ra phương pháp chế tạo vật liệu có thể hấp thụ năng lượng mặt trời khi trời tối. Đây là công trình nghiên cứu của Phòng thí nghiệm quốc gia Idaho, Cty Microcontinuum và Đại học Missouri (Mỹ).
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