Made in Germany | Producing energy from sewage

Bio-technology makes it possible: refuse water from the food industry turns into methane gas and that's used to produce power. Meter-high bio-reactors are an export hit and especially popular in Russia and Eastern Europe.The Darmstadt-based firm Envirochemie does 70 percent of its sales abroad. But now it beginning to feel the effects of the financial crisis. Marion Hütter examines.