Steel, a vital component of infrastructure and economy, contributes massive environmental damage in its production process as it relies heavily on coal as a fuel. In the steel production process, carbon (primarily sourced from coal and natural gas) reacts with iron ore to produce molten iron, which is then refined to create steel. This process generates vast amounts of carbon dioxide (CO2) and as a result, the steel industry alone, globally, emits over 3.7 billion metric tons of CO2 every year, contributing to 7–9 % of carbon emissions.   To combat the issue, a team of researchers, Arnab Dutta, Sukanta Saha, Suhana Karim and Santanu Ghorai, from the Chemistry Department at the Indian Institute of Technology Bombay (IIT Bombay) have come up with a set of sustainable catalysts for generating green hydrogen that can be utilised in steel making process via hydrogen-based direct reduction of iron (H-DRI) method.  In a recent review published in the Journal of Energy and Climate Change, researchers from IIT Bombay, led by Professor Arnab Dutta, have collated the advances made in the …