The global push for sustainability is reshaping heavy manufacturing towards decarbonization to tackle nearly 20% of global CO2 emissions. Industries are exploring biofuels, hydrogen, and renewable electricity as sustainable alternatives for energy-intensive processes. Green hydrogen, produced from renewable electricity, is gaining momentum, with the potential to reduce emissions significantly. Biofuels and renewable electricity are also being adopted, with examples like Dalmia Cement in India using biomass-based fuel to cut carbon intensity. The shift to alternate fuels is supported by regulations and incentives like the EU's Emissions Trading System, driving cost reductions and job creation in the renewable energy sector. However, challenges such as high initial investments, supply chain complexities, and technological gaps persist. The future outlook involves collaborations for carbon pricing, public-private partnerships, and fuel technology innovations. The heavy manufacturing industry is on the verge of a green revolution, with the potential to cut emissions by 60% by 2050, aligning with global climate goals.