More specifically, we combine recent historical GDP and CO2 emission intensity growth rates with projected growth rates from the IMF [2] (for near term GDP growth) and McKinsey and Co.[3] (for projections of longer-term GDP growth and emission intensity changes), to produce annualized projections of future GDP and CO2 emissions intensity. The product of the projected GDP and CO2 emission intensity yields national CO2 emission pathways. For non-CO2 emissions, we use projected growth rates from the US EPA.