powering london into the 21st century march 2006 this report was written by pbpower energy services division for mayor of and greenpeace parnell house 25 wilton street sw1v 1lw 020 7798 2400 www pbworld com cover picture getty 1 foreword ken livingstone 2 preface stephen tindale 3 executive summary 4 introduction 6 context structure technologies suited to a decentralised system 7 how can be used in 9 methodology 12 time horizon co reduction target establishing base demand 2005 predicted growth 2025 four supply scenarios 15 5 emissions electricity heat balance calculation sources data 16 their potential 17 table low distributed generation projections 18 high 19 discussion results 20 primary analysis