Sustainable energy in the developing world
Endev - energy access facts and information.
Energia - gender and sustainable energy network working in Africa and Asia.
Energypedia - a wiki based online platform for renewable energy and energy efficiency topics in developing countries.
Global Alliance for Clean Cookstoves (GACC) - useful facts, stats and reports on cookstoves.
International Renewable Energy Agency - factsheets, news and figures on renewable energy.
Lighting Africa - a joint IFC and World Bank programme working in Africa. This is a great source of information on off-grid lighting in the region.
Practical Action - the 'practical answers' section of the website is particularly useful.
Sustainable energy for all - browse the practitioner section for facts and stats from this UN-led initiative.
UN Energy - the United Nations' inter-agency mechanism on energy. A good resource on financing, policies and energy sources in the UN.
Sustainable energy in the UK and US
Carbon Trust - tools, guides and reports on how businesses can reduce their carbon footprint.
Energy Saving Trust - impartial advice to communities and households. Also the only decent source of information on travel we've found so far.
YouGen - practical information for individuals and businesses on energy efficiency and renewables.
The Guardian's energy efficiency section is a good place for topical information and advice.
Expertise is a great source of information about the cost of solar and other domestic solar PV information.
Sustainable energy associations
Association for the Conservation of Energy - great blog, plus research papers on energy efficiency and fuel poverty.
Grassroots Innovations promotes community-led solutions for sustainable energy.
Renewable Energy Association - look at the information section for facts, figures and useful links.
Sustainable Homes Index for Tomorrow - jargon-free information on sustainable homes.
UK Green Building Council - find case studies and sustainability news about the green building sector.
Research and statistics
Department of Energy and Climate Change (DECC) - find out about government energy policies and strategies and trawl through energy statistics.
Energy Efficiency Statistics from DECC - does what it says on the tin.
Eurostat - recent statistics on renewable energy sources in the European Union (EU).
UCL Energy Institute - delivers world-leading learning, research and policy support on climate change and energy security.
Without the hot air - Plain English overviews of sustainable energy topics and current issues.
Energy saving in schools
Eco-Schools - an international awards programme that guides schools on their sustainable journey.
Sustainability and Environmental Education (SEED) - supports educators to help young people learn about sustainability.
News and opinion
The Ashden Blog - news and insight from the Ashden team.
Business Green - a useful source of in-depth comment and news.
The Carbon Brief - excellent daily news digest on climate and energy-related news. Very good at explaining complex debates.
Refocus - sustainable energy news site, focusing on renewables.
Renewable Energy World - another great source of renewable energy news and opinion.