research and development on renewables in germany joachim luther fraunhofer institute for solar energy systems ise faculty of mathematics physics university freiburg general remarks the author this paper does not speak behalf german government a new program r&d will be adopted by federal early 2005 programs are run berlin länder governments three reasons transformation global system protection natural life support eradication poverty reduction geopolitical conflict potentials an exemplary path 450 ppm co 2 stabilisation biomasse traditional advanced oil coal gas nuclear power hydroelectricity pv thermal generation heat only other geothermal wind 2000 2020 2040 200 600 1000 1400 demand per year ej year2100 source advisory council change 2003 www wbgu de goals 2008 2012 greenhouse gases 21 2010 electricity production from 12 5 40 precondition eu 30 goal ministry environment