I'm not so sure. Usually a fusional process requires an extremely high pressure and/or temperature (temp obtained through pressure) which in natural circumstances only occurs in hydrogenbombs (fusion triggered by a plutonium or uraniumbomb) and stars... Bigger stars=higher gravity=higher pressure=faster fusionreaction. These circumstances are almost impossible to create under earthly conditions but there are tries. National Ignition Facility
fuses hydrogenisotopes into helium with the pressure and temperature achieved by firing several laserbeams onto a golden tube containing the isotopes.
Most projects uses a tokamak construction like ITER
which fuses hydrogen into helium by heating hydrogen plasma into extremely high temperatures while holding the plasma into place with magnets. There are quite a few projects around.
Rossis fusion is said to work with low pressure and moderate temperaturelevels. In my intuition there needs to be a very high energy to fuse two atoms to form another element so "cold fusion" seems to me as a contradiction. It's certainly not impossible that there are some unknown factors here though. We live and learn all the time.
Mb: Asus P5W DH Deluxe
Cpu: C2D E6600
Gb: Nvidia 7900GT + 8800GTX
3D:100" passive projector polarized setup + 22" IZ3D