http://www.newsweek.com/nuclear-fusion-when-ready-electricity-technology-1773349

Nuclear fusion is the hottest new energy source in science—quite literally.

Milestone breakthroughs have been made in the field of fusion power, taking us even closer than before to the possibility of generating electricity using only hydrogen as fuel. While the technology is still many years away from being widely used, the hope is that some nuclear fusion reactors will be fully operational by 2027.