Kinetic energy harvesting and a coating to preserve fruit and veg are also in the running.
Onshore wave power is being put through its paces as the fledgling sector powers up.
European cities are digging deep into the Earth’s core to tap into geothermal heat.
Could these thermal blocks solve the puzzle of balancing the grid with sun and wind power?
Cars with built in solar panels powered by the sun’s rays may soon be zipping down the highway.
Researchers are developing a solar device that can pull fuel from the air that we breathe.
£1m apiece was awarded to propel these five planet-saving creations towards greater impact.
Tech that replaces the silver electrodes in solar cells has attracted financial backing from tech billionaires.
Smaller emitters may soon tap into shipping container-sized modular carbon capture solutions.
Two energy Islands, one of them artificial, will one day power the entire country.