Biogas

Ahead of the release of the World Bank's revised energy strategy, the Ecologist speaks to sustainable development advocate Srinivas Krishnaswamy about why despite huge gigawatt power projects, 45 per cent of India's households still lack electricity

This gallery of images shows the simple, low-tech processes involved in turning organic wastes into a clean-burning, forest-preserving cooking fuel

Campaign groups believe the payments will be too low to encourage significant numbers of people to install small scale renewable energy in their homes and communities

UK energy company promises to use gas from food waste and sewage to provide homes with 'green' gas supplies

Electricity operator National Grid believes that with the right Government incentives, renewable gas could be produced from our waste and fed straight into the mains

Find out if your council is about to waste your waste in favour of incinerators with our interactive map

Biogas - a methane-rich fuel made from rotting food waste or sewage - has huge potential as a clean, green fuel for the UK. But a perverse web of subsidies, rules and contracts could mean UK councils are about to kiss goodbye to the real power of waste...

Growing crops to solve the planet’s energy needs doesn’t work. Recycling the energy in our waste just might have a significant part to play. By Jeremy Smith & Jon Hughes

This beautiful but deadly plant proliferates in lakes across Africa – choking everything in its path. Why, asks Tom Hargreaves, have all attempts to manage it failed?