Well, just another step toward geothermal theory of global warming. The Nature article even mentions "Nuclear fusion reactions without radioactivity" in this respect - is it finally a silent acceptance of cold fusion reality by Nature journal? Note that the cold fusion research at Utah university has started with Dr. Steven Jones research of elevated hellium-3 content around volcanoes and hydrothermal vents. Steven Jones coined the term "piezonuclear fusion" in analogy to the term "thermonuclear fusion," to indicate that the proposed approach is to induce fusion by "squeezing" the hydrogen nuclei together at near room temperatures rather than by heating them to very high temperatures. (The prefix "piezo-" comes from a Greek work meaning to squeeze or compress.)
In this connection Dr. Palmer suggested that rock, lava, or crystals in the Earth might help to catalyze the fusion reaction. This creative leap is recorded in Dr. Palmer's logbook, dated March 13, 1986 in some detail (copies available on request to BYU Physics Department).