Two of the largest emitters on the planet are the United States and Europe with combined annual economy-wide greenhouse gas emissions of approximately eleven billion metric tonnes (30% of total). With the Russian invasion of Ukraine, there is growing price instability in energy across these regions. There are pathways to decarbonize Europe and the United States. Recently, the USA passed the IRA legislation, which substantially improves the economics of these pathways. In this presentation, we will study some of these pathways discussing details of important inputs and variables that contribute to specifics of the pathway course.