As written in AP…

Masanori Naruse jogs every day, collects miniature cars and feeds birds in his backyard, but he’s proudest of the way his home and 2,200 others in Japan get electricity and heat water — with power generated by a hydrogen fuel cell. The technology — which draws energy from the chemical reaction when hydrogen combines with oxygen to form water — is more commonly seen in futuristic cars with tanks of hydrogen instead of gasoline, whose combustion is a key culprit in pollution and global warming. Developers say fuel cells for homes produce one-third less of the pollution that causes global warming than conventional electricity generation does.