The article highlights the innovative OTC 35088 direct lithium extraction (DLE) technology, developed by Alma Energy and The University of Texas at El Paso, which uses electrodialysis to extract lithium from geothermal brines. This technology not only offers the production of battery-grade lithium carbonate or lithium hydroxide but also the potential for generating green hydrogen, freshwater, and sequestering CO2. The DLE process is sustainable, utilizing existing wells and subsurface data to efficiently produce lithium while operating in conjunction with geothermal power plants. Additionally, the article discusses recent research on oxygen-generating polymetallic nodules in the deep seafloor of the Clarion-Clipperton Zone in the central Pacific Ocean. These nodules, rich in rare earth metals like lithium, cobalt, nickel, and copper, have the potential to provide a new source of critical metals for batteries and renewable energy technologies. However, deep-sea mining of these nodules raises concerns about the significant environmental impacts on marine ecosystems, necessitating a careful balance between economic gains and environmental protection. Overall, the article explores innovative technologies for lithium extraction and potential sources of critical metals, emphasizing the importance of sustainable practices and environmental stewardship in the energy and mining sectors.