Two significant developments in decarbonizing steel production have occurred recently: Boston Metal secured $262 million for its electricity-based steel-making tech, and H2 Green Steel raised €1.5 billion to produce steel using hydrogen. We can consider three scales to address climate change challenges: 1. Thousands: There are 1,016 steel plants globally with a capacity of 3 billion tons, offering a defined market for decarbonization tech. 2. Millions: Boston Metal's funding focuses on team growth and tech demonstration, emphasizing that hundreds of millions are just the starting point for scaling up. 3. Billions: H2 Green Steel aims to produce 5 million tons by 2030, a fraction of the industry's 1.95 billion tons in 2021. Transforming steelmaking will require trillions of dollars and widespread commitment from investors, policymakers, asset managers, and consumers. Decarbonizing steel is crucial, and it demands substantial investment and collective efforts to transition.