biomass to energy in germanypast present futurean overview prof dr bernd stephan university of applied science bremerhaven germany consumption primary iea bee world 84 744 twh year2003 ec 25 10 080 2 936 year2005 structure consumptionworld ec25 ev worldec25germany 2003 2005 natural gas19 5228 832 1 nuclear2 54 6 43 5 7 renewables20 34 8 57 4 coal13 86 9 0518 mineral oil43 7147 1537 total year 87 7410 082 germany2002 200220042005 gas21 722 432 nuclear12 612 renewables 3 lignite11 611 213 oil37 536 37 utilization 2004 solid44 liquid 0 gaseous solar thermal geothermal waste biodiesel rape oil ethanol hydropower14 wind energy17 photovoltaic what is meant by materials produced metabolic activities biological systems and or products their decomposition conversion the are based on carbon