Hans-Josef Fell supported the shift in military training methods towards conflict deescalation, particularly at the Bundeswehr base in Hammelburg.

From 1999 to 2005, as spokesman of the Alliance 90/The Greens parliamentary group on the German Bundestag’s research committee, Hans-Josef Fell helped to ensure an increase in funding for research into photovoltaics, concentrating solar power, geothermal energy, bioenergy, batteries for electric cars, bionics, nanotechnology and others.

Hans-Josef Fell has initiated many technical assessment reports, which in some cases still offer important foundations for legislative developments today, for example: nanotechnology, geothermal energy, transport systems of the future, various medical issues such as research into the brain, nuclear fusion, and genetic engineering in agriculture and medicine.

Hans-Josef Fell wrote the draft of the Renewable Energy Sources Act (EEG), which was adopted in 2000 in the face of strong political opposition.

Additional key members are Dr. Werner Zittel, a senior scientist at the Ludwig Bölkow Systemtechnik GmbH, and Dr. Christian Breyer, an expert of Solar Economy at Lappeenranta University of Technology in Finland.