Columbia Engineering researchers in Prof. Yuan Yang's group have developed porous polymer coatings (PPCs) that enable inexpensive and scalable ways to control light and heat in buildings. They took advantage of the optical switchability of PPCs in the solar wavelengths to regulate solar heating and daylighting, and extended the concept to thermal infrared wavelengths to modulate heat radiated by objects. Their work is published on October 21, 2019 by Joule.

Adam Sobel, Professor of Applied Physics and Applied Mathematics and of Earth and Environmental Sciences, testified before Congress on Thursday, September 26, 2019, as part of the hearing on "Understanding, Forecasting, and Communicating Extreme Weather in a Changing Climate."