Fukushima made many people oppose nuclear power. What it would take to change their minds?
A geothermal revolution is set to electrify Africa. Tom Heap visits Kenya's Rift Valley.
Sybil Ruscoe is at a farm growing maize to produce electricity by anaerobic digestion.
Can we exploit the hot rocks beneath the earth's crust for power? Peter Gibbs reports.
Anti-nuclear protests gather force.
Nuclear scientist Dr Sue Ion discusses nuclear power.
Professor Paul Younger talks to Jim Al-Khalili about keeping the lights on in the future.
Tom Heap finds out how communities large and small can produce their own electricity.
Alice Roberts discovers the potential savings available by harnessing the power of sewage.
Jim Al-Khalili talks to Sue Ion about working in the nuclear industry post-Chernobyl.
Will the promise of energy from the oceans become reality? Tom Heap reports.