Buildings are a surprisingly large source of emissions. The energy they use for air conditioning, heating, lights, and so on is responsible for nearly 14% of all greenhouse gases. And buildings waste a lot of energy: Because of inefficient windows and gaps in what’s known as the building envelope, as much as 40% of heated or cooled air leaks out of the typical building. LuxWall and Aeroseal are two innovative companies that are addressing the ways buildings leak energy through windows and ducts. Learn more at https://gatesnot.es/3CWM9E1