“Copenhagen was a failure”. Huge pains were taken to reach a global agreement of the greatest industrial-political dimensions according to the slogan “two degrees non plus”. The end of the...

Now the Desert Tec GmbH has been established. October, 30th, 2009! On the whole: low tech. Still, it is a huge challenge, see this link. My pessimistic friend Roland Dürre...

Sahel, the green shore of the Sahara, 6,000 kilometres on a vertical line through Africa. Each year, the desert claims another 10 kilometres as it expands southwards. Thanks to the...

Since 1990, four windmills in Vollerwiek have been producing 2 MWatts of energy at a very constant average. The production has been rather stable because near the coast one low-pressure...

A blog is supposed to be up-to-date, but where is the newsworthy reference? In the early 1970ies, we witnessed a very strange approach to pedagogics. Programmed teaching was implemented with...