Awards
| 1997 | Doctor honoris causa, bestowed by the Technical University of Varna, Bulgaria |
| 1998 | Solar World Prizes, awarded by the 2nd World Photovoltaic Solar Energy Conversion Conference, Vienna |
| 1999 | Alternative Nobel Prize (Right Livelihood Award), Stockholm |
| 2000 | World Prize on Bioenergy, awarded by the 1st World Biomass Conference, Sevilla |
| 2002 | Hero for the Green Century, TIME Magazine |
| 2004 | Global Renewable Energy Leadership Award awarded by the American Council for Renewable Energies (ACORE), New York |
| World Wind Energy Award, awarded by the World Wind Energy Conference, Beijing | |
| 2005 | SolarWorld Einstein Award, Bonn |
| 2007 | Doctor honoris causa, bestowed by University Lüneburg, Germany |
| 2008 | Professor honoris causa, bestowed by Tongji University Shanghai, China |
| 2009 | Karl Böer Solar Energy Medal of Merit awarded by the University of Delaware, USA |
| Further Awards... |
| 2000 | Man and the Sun Great Contribution Award in Qingdao, China |
| 2001 | Book Prize of the German Foundation for the Environment (Deutsche Umweltstiftung) for the publication "Klimawechsel" with Carl Amery |
| 2006 | TERIalumni Award for Excellence, TERIalumni Trust, New Delhi |
