<P> Source: EUROBSER'VER (Observatoire des énergies renouvelables) Photovoltaic Barometer - installations 2014 </P> <Table> Solar heating in the European Union (MW) <Tr> <Th> </Th> <Th> 2008 </Th> <Th> 2009 </Th> <Th> </Th> <Th> 2011 </Th> <Th> 2012 </Th> <Th> 2013 </Th> </Tr> <Tr> <Td> EU total </Td> <Td> 19.08 </Td> <Td> 21.60 </Td> <Td> 23.49 </Td> <Td> 25.55 </Td> <Td> 29.66 </Td> <Td> 31.39 </Td> </Tr> <Tr> <Th_colspan="7"> Sources: </Th> </Tr> </Table> <Tr> <Th> </Th> <Th> 2008 </Th> <Th> 2009 </Th> <Th> </Th> <Th> 2011 </Th> <Th> 2012 </Th> <Th> 2013 </Th> </Tr> <Tr> <Td> EU total </Td> <Td> 19.08 </Td> <Td> 21.60 </Td> <Td> 23.49 </Td> <Td> 25.55 </Td> <Td> 29.66 </Td> <Td> 31.39 </Td> </Tr>

Three european cities that had invested the most in renewable energy by 2011