At just 34, Laureen Meroueh is modernizing the steel industry. Boasting a Ph.D. in mechanical engineering and materials science from the Massachusetts Institute of Technology, she developed a method of turning iron ore into steel in a single step. In October, Hertha Metals broke ground on its first commercial facility, located in the Houston metro area, and secured more than $133 million in a Series A funding round, including $65 million from the Department of Defense to produce American-made rare earth magnets for F-35 jet fighters and missile guidance systems. What is the single most important action you think the public, or a specific company or government (other than your own), needs to take in the next year to advance the climate agenda? Back climate solutions that win on cost first and cut emissions second.