Theta Chi is dedicated to creating an environment of truth, temperance and tolerance, enabling gentlemen of the fraternity to assume leadership positions, prosper academically and form brotherhood bonds. Beyond being a home away from home, we strive toward contributing to the campus and community.
Carbon is a component of all organic molecules, many of which are essential for life. The ultimate source of all organic molecules is primary production, in which photosynthetic organisms take in carbon dioxide gas (or bicarbonate - CO2's water-dissolved form) and, using sunlight as an energy source, convert it into glucose.
Deep within the bowels of the earth there are bacteria whose sole source of energy come from hydrothermal activity of the earths core, so we can rule out the sun theory. As far as I can tell, if you keep tracing back the source to some common ancestor, the deeply unsatisfying answer is that the ultimate source of energy is... energy.