The article discusses the critical need for sustainable financing to facilitate a just energy transition and achieve 2050 net-zero goals. Despite the capital-intensive nature of key decarbonization solutions like large-scale renewable development, green hydrogen utilization in hard-to-abate sectors, and energy efficiency improvements, current funding levels fall far below the necessary range. Deloitte's economic analysis emphasizes the importance of annual global investments in the energy sector, estimating a required range of US$5 trillion to US$7 trillion for achieving net-zero greenhouse gas emissions by 2050. However, the current annual investment is well below this range, at less than US$2 trillion. Failure to bridge the financing gap could be especially costly for developing economies in the Global South, where green projects face additional financing costs due to various risks. This green financing premium can make projects less bankable and significantly increase the cost of capital, hindering the transition. To address this, the article suggests three focus areas: reducing project risks, bridging cost gaps with high-emission products, and cutting fossil fuel usage. It emphasizes that creating a sustainable financial ecosystem is essential, with involvement from governments, regulators, concessional investors, and societies to mitigate risks, mobilize private capital, and facilitate the transition successfully.