MIT develops see-through film that blocks 70% of sun's heat
MIT researchers have developed a see-through film that can block up to 70% of the sunâs heat. It's able to remain highly transparent below 32 degrees Celsius, above which it acts as an âautonomous systemâ to reject heat, the researchers said. The material can be coated on windows and can lower air conditioning and energy costs by 10%, they added.