When I walked along the beach in San Francisco in 2012 I have seen so many young people who slept there, obviously they were sort of homeless, but somehow not suffering from living without a shelter. In the streets you see selfmade cardboards serving as temporary mini homes in so many corners of the street. In Germany (especially in Berlin-Kreuzberg where I live) we also have a lot of people sleeping in the streets. There is one guy (obviously psychologically handicapped) with a big beard and fresh new sneakers who collects paper and sleeps on a long windowbench in the entrance hall of the „Berliner Bank“ at Mehringdamm. This is the best place for homeless, because under the bench their is the heating radiator. In Germany financial institutes mostly install their radiators underneath their wide windows with the unintended effect, that they display the butts of our homeless society in the most prominent way. In Germany, when the winter hits the streets (minus 20° Celsius), it’s a question of life and death, if you don’t have a warm shelter, unlike San Francisco, where you probably won’t die from cold by sleeping at the beach. So let’s talk about warmth and heating. What I don’t like about the sustainabilty movement is that everybody is talking about so called „K-Werte“ (a measurable benchmark to validate the efficiency of windows and walls). CO2-neutrality is the magic word of all big companies who try to point out their sustainable programs. Today there is a global trade with CO2 emission papers. I don’t get it. What is sustainable about the idea, that you can kill a tree as long as you replace it with another tree somewhere else instead in the world? Killing, burning and exploitation is destruction. You are not allowed to kill a baby, no matter how many babies you bear. Mathematics end where morality start. So when it comes to heat production, warmth and electricity, we as a global community must make sure that no one has to suffer from cold independent on his race, his status and money. As long as there is a free sun, and free wind, and free water, (gas, oil, rivers and copper are obviously already made unfree) all energy products, that is based on these natural ressources, mustn’t operate against the accessibility to warmth. And there is another sort of warmth, no energy facilitor copes with: Social warmth. You can not measure it, you can not trade with it. It begins with creative solutions to keep stranded people away from suffer from cold. No benchmarks here. But a bench in an entrance hall can mark more social warmth than a 100 pages CSR report.