Focus fusion is hottest idea in nuclear energy (also in Chinese and Russian)

Realizing nuclear fusion as a practical energy source poses enormous challenges owing to the extreme physical conditions required by the known fusion reactions. These include temperatures of 100 million degrees Celsius or more and astronomically high pressures, which must be maintained long enough to reach a net energy output. 

Efforts to achieve this goal are dominated today by expensive, large-scale experimental facilities utilizing ultra-high power lasers and microwave generators, particle beams, giant superconducting magnet systems and other advanced technologies. One might conclude that fusion, if and when it becomes a reality, will be a complex, highly capital-intensive way to produce energy. 

But what if there were a much easier approach, one that would not require such elaborate technical means to achieve the extreme temperatures and pressures required? A method in which nature would do most of the work for us?