This is a fusion reaction between deuterium atoms in solid materials.
Over the last 20 years, it has been explored in laboratories world-
wide and found to be much more efficient and cheaper than the
conventional plasma fusion (ITER) method. It has produced thousands of
times more energy per gram of fuel than any chemical reaction, and it
can probably generate millions of times more. In some experiments, it
has reached temperatures and power density comparable to the core of a
conventional fission reactor.
This method is still not sufficiently understood to be scaled up or
commercialized, but the potential is great. Government funding is
needed to help achieve this understanding. Senior researchers at
National Laboratories, the U. S. Navy and other government
laboratories have done outstanding cold fusion research in the past,
and they would like to do more, but they have not been adequately
funded.
Technical details about cold fusion, including hundreds of peer-
reviewed scientific papers from mainstream journals, can be found at
this website