The university recently completed the Cornell University Borehole Observatory (CUBO), a nearly two-mile deep exploratory borehole. Data gathered through CUBO, such as subsurface rock conditions and heat output, will allow the university to determine if it can move forward with Earth Source Heat (ESH), our version of a deep geothermal system that researchers believe has the potential to sustainably heat Cornell’s Ithaca campus without the use of fossil fuels.