a very efficient and economical process but if it's really hot outside we have to switch over to a large refrigeration system to keep the facility cool trying to move on. the heat that's generated by the servers is a serious problem. highty experts and engineers around the world are trying to come up with solutions. lots of people use the internet all day long frequently checking into social media platforms like facebook twitter or youtube and all those billions of clicks use a lot of energy. these four young women in berlin are roommates ana martina martina and not tell yet use digital technology to organize their home. and that's why they call themselves smart roommates. yes it has been mom the first thing we do when we