The world needs a new source of energy, an unspillable source.

What kinds of equipment and raw materials would be needed to construct a hydrogen fusion plant?

The nuclear fusion of hydrogen atoms is one of the most promising alternative energy technologies to pursue. If mankind is able to capably harness the fusion power of a hydrogen atom, our energy problem would be effectively solved.

What would it take in terms of equipment and raw materials? Estimated cost in US dollars? Time to construct and implement a working reactor?