Researchers are looking for alternatives to fossil fuels . Former NASA engineer Jens Dall plans to put solar power plant into space . Read more : Can Africa unlock its solar potential ? Portugal , France , France and Portugal world leaders in wave power . Danish inventor Jens Dall Bentzen creates biomass furnace that can burn wet wood .
Researchers are looking for alternatives to fossil fuels . Former NASA engineer Jens Dall plans to put solar power plant into space . Portugal , France , France and Portugal world leaders in wave power . Danish inventor Jens Dall Bentzen creates biomass furnace that can burn wet wood .