EarthHydrogen power lights up the seas A fuel cell is being used to power a lighthouse on England's North Sea coast, replacing a cabled electricity source that was prone to wave damage ¿ìè¶ÌÊÓÆµ
TechnologyGrass-munching bugs could charge rural phones The bacteria-powered cellphone charger is aimed at poor countries where plant waste is more accessible than electricity ¿ìè¶ÌÊÓÆµ