Climate Change and Sustainable Energy - Four Areas of Promise

Almost a billion people live without energy access to day. Billions more live without access to reliable energy. Two point three billion can only afford a highly inefficient or polluting air conditioner. We need every air conditioner for sale everywhere to be at least 50 % more efficient than the most efficient air conditione on the market today. And that by 20 30, electricity demand for cooling buildings could jump by 50%. The solutions go well beyond just fixing air conditioning. They range from city design to architecture, from building materials to appliances,. From geo engineering to green roofs. There are four areas of promise if we step up to the plate and take action.