Researchers are exploring an underground salt deposit in Queensland for 'on-demand' energy storage, using a 1.9-mile borehole drilled into the Adavale Basin by Geoscience Australia. The caverns could store 6,000 metric tons (6,614 tons) of hydrogen or compressed air, or roughly 100 gigawatt-hours of energy. This could be used to move turbines and recover the energy for later use. Geoscientist Mark Bunch believes these facilities have "enormous potential" as alternatives to lithium-ion battery storage. However, there are challenges to the Great Artesian Basin above the site, the largest freshwater basin in the world. The results of the geological study are expected to be published in six months.