Since WEO-2008, the economic downturn has led to a drop in energy use, CO2 emissions and energy investment. Is this an opportunity to arrest climate change or a threat that any economic upturn might be stifled at birth?

What package of commitments and measures should the climate negotiators at the UN Climate Change Conference (COP 15) in Copenhagen put together if they really want to stop global temperatures rising? How much would it cost? And how much might the developed world have to pay to finance action elsewhere?

How big is the gas resource base and what is the typical pattern of production from a gas field? What does the unconventional gas boom in the United States mean for the rest of the world? Are we headed for a global gas glut? What role will gas play in the future energy mix? And how might the way gas is priced change?

All these questions and many others are answered in WEO-2009. The data are extensive, the projections more detailed than ever and the analyses compelling.