Pledge - made at the Clean Energy Ministerial summit in San Francisco - will save energy equivalent to decommissioning 60 coal-fired power plants
International Energy Agency report highlights huge role of cities in boosting low carbon energy, buildings and transport innovation
Winners of Energy Productivity Innovation Challenge (EPIC), funded by ClimateWorks Foundation, to be announced in London in October
OECD report highlights importance of green investment banks in boosting green infrastructure - as long as the right policy environment is in place
World Energy Council Trilemma Report outlines clear need for innovative investment policies to encourage growth of low-carbon energy
Industry experts criticise Vote Leave's claims Brexit would mean cheaper energy bills, suggesting it would actually lead to higher prices and increased carbon emissions
Mandatory energy-efficiency trading scheme could unleash multibillion-dollar market, says market tracker
RSPB's Vision 2050 assesses whether UK can meet its climate targets while avoiding damage to wildlife and plant populations
BT report argues wider use of ICT in business has potential to bring significant carbon emissions cut, as well as a £525bn economic boost
Supporters argue UK version of Dutch 'energy leap' promises to radically overhaul the faltering energy efficiency home retrofit market