This Intergovernmental Panel on Climate Change Special Report (IPCC-SRREN) assesses the potential role of renewable energy in the mitigation of climate change.

Bioenergy and water are inextricably linked. for the first time, this report examines in depth these interlinkages, highlights the risks and opportunities, and offers an outlook on ways to address them.

This annual report is considered by many to be the most authoritative appraisal of clean energy investment trends. The 2009 edition is being released during one of the worst financial and economic crises for a generation. This year's Global Trends survey was never likely to show the kind of extraordinary growth in renewables that has underlined previous years. Nevertheless, investment in the sustainable energy market has in some ways defied the global recession growing by around five per cent.

Hydrogen holds out the promise of a truly sustainable global energy future. As a clean energy carrier that can be produced from any primary energy source, hydrogen used in highly efficient fuel cells could prove to be the answer to our growing concerns about energy security, urban pollution and climate change. This prize surely warrants the attention and resources currently being directed at hydrogen – even if the prospects for widespread commercialisation of hydrogen in the foreseeable future are uncertain

Hydrogen holds out the promise of a truly sustainable global energy future. As a clean energy carrier that can be produced from any primary energy source, hydrogen used in highly efficient fuel cells could prove to be the answer to our growing concerns about energy security, urban pollution and climate change.

Published in Association with the United Nations Environment Programme. The need to reform energy subsidies was one of the pressing issues highlighted at the World Summit on Sustainable Development. Many types of subsidy, especially those that encourage the production and use of fossil fuel, and other non-renewable forms of energy, are harmful to the environment. They can also have high financial and economic costs, and often only bring few benefits to the people for whom they are intended.

An explanatory summary of the issues and challenges in removing or modifying subsidies on energy that undermine the pursuit of sustainable development.