The rapid growth in AI has resulted in a surge in power demand for data centres, prompting major hyperscalers like Amazon, Microsoft, Meta, and Google to seek new grid capacity using sustainable energy generation methods. The focus is on aligning with ambitious sustainability goals, with a shift towards renewable energy sources like wind and solar power. Additionally, emerging energy solutions such as small modular nuclear reactors, hydrogen and fuel cells, enhanced geothermal systems, and grid-scale Li-ion batteries are gaining increased investment from the data centre industry. Amid a push for hourly time-based energy matching to address power-based CO2 emissions, there is a growing need for carbon-free energy sources that are not intermittent like wind and solar power. Although these new energy technologies currently come with higher costs than fossil fuels, there is a belief that investing in them now can lead to long-term energy cost savings. IDTechEx projects that by 2035, the global data centre sector could save $150 billion by transitioning to low-carbon energy sources compared to a fossil fuel scenario. Technologies such as small modular nuclear reactors, hydrogen and fuel cells, enhanced geothermal solutions, and Li-ion batteries are anticipated to play significant roles in this transition. For instance, small modular nuclear reactors promise cost reductions and quicker construction times, while hydrogen and fuel cells offer opportunities to convert renewable energy into electricity for continuous power generation in data centres. The article also highlights the potential of enhanced geothermal technologies supported by companies like Google and Meta, as well as the importance of grid-scale Li-ion batteries for increasing solar/wind energy-powered hours. In conclusion, the article emphasizes the positive outlook for the data centre industry's sustainable energy transition, especially with the support of significant investments in AI infrastructure. The shift towards low-carbon energy sources and the adoption of innovative technologies demonstrate a commitment to a greener and more sustainable future for data centres.