Sanjay Wahal, PhD, is a seasoned sustainability strategist, systems thinker, and climate innovator with deep expertise in decarbonization technologies, bio-based materials, and circular economy solutions. With a doctorate in Chemical Engineering, an MBA in Strategy and Innovation, undergraduate degree from IIT Kanpur, and a career spanning over three decades of cross-functional experience, Dr. Sanjay Wahal brings rare clarity to complex global challenges. His career spans industry leadership, applied research, and strategic advisory roles across climate innovation, advanced clean technologies, and the transition to low-carbon pathways and regenerative systems. He has advised startups, Fortune 500 companies, and institutional investors worldwide, and is the author of multiple technical publications and co-inventor on several patents. Dr. Wahal is the founder and president of Decarbonization, LLC, an advisory and consulting fi rm at the intersection of science, AI/ML, policy, and market transformation. His work empowers institutions to reimagine carbon not just as a liability, but as a strategic and societal asset. He has collaborated with leading climate-tech ventures and impact investors to accelerate decarbonization through innovation, finance, and inclusive strategy. Dr. Wahal is the lead author of "Forecasting a United States Carbon Allowance Price Index Using Neural Networks and Macroeconomic Indicators," currently under review for publication in a reputed journal. With a unique blend of technical depth, strategic insight, and intimate understanding of India's digital and policy landscape, Dr. Wahal brings both grounded realism and visionary clarity to the eCarbon Card concept. His frequent engagements with policymakers, corporate leaders, and civil society further enriches this book's actionable, citizen-first approach to climate action. He and his wife, Anupama, live in Appleton, WI.