SkyCool Systems has developed a groundbreaking radiative cooling technology that can cool buildings without using electricity. Their panels use a specially designed optical film that reflects sunlight and emits heat as infrared radiation, which can pass through the atmosphere and into space. This passive cooling method can reduce air conditioning energy use by up to 15%, making it an efficient solution for both commercial and residential buildings.

Planck Energies, a startup founded by Professor Yi Zheng at Northeastern University, is developing a groundbreaking passive cooling technology that could significantly reduce our reliance on energy-intensive air conditioning systems. Their innovative approach focuses on creating a highly reflective, ultra-white paint designed for roofs and other surfaces.

Who says your roof can't be a lush garden? Green roofs are an excellent passive cooling technique that's gaining popularity in urban areas. LiveRoof is a leader in the green roof industry and their modular green roof systems provides excellent passive cooling for buildings by absorbing heat, reducing the urban heat island effect, and improving insulation. By covering your roof with vegetation, you create a natural insulation layer that absorbs heat and keeps your building cooler. Plus, these rooftop oases help reduce the urban heat island effect, improve air quality, and provide a habitat for local wildlife. It's a win-win situation for you and the environment.