This is the theory of Earth Core Warming which presumes that if there is Global Warming in the sense that  the climate of the earth is warming due to greenhouse gasses emitted during the past one hundred fifty years of human development then it is possible that the earth’s core will also warm, and that the consequences of such warming may well be catastrophic. I am assuming that there is a direct and intimate connection between the atmospheric climate and condition in the the sub-surface of the earth.