Integrating building and transportation energy use to design a comprehensive greenhouse gas mitigation strategy

Building and transportation sectors account for approximately 75% of CO₂ emissions. A mitigation strategy that combines both renewable energy sources and adoption of all-electric vehicles (EVs) instead of conventional gasoline powered vehicles thus seems most promising. The desired outcome of this strategy cannot be achieved without taking into consideration human activities in building and transportation. This study compares the energy use in building and transportation, aiming to provide a proper approach for evaluating the effectiveness and possible CO₂ emissions reductions of GHG mitigation strategies. The analysis of the collected data showed that on average each individual produced around 20lbs of CO₂ per day, 62% of the total CO₂ was emitted in transportation. The mitigation strategy including EVs powered by electricity generated from coal-fired power plants resulted in average CO₂ emissions reductions of 3.7%. The mitigation strategy using the EVs powered by solar energy obtained from grid-tied solar panels have led to 12.2% CO₂ emissions reductions per day (from 12.38lbs/day to 10.87lbs/day), and the strategy incorporating EVs with the off-grid source of power was the most successful strategy and resulted in an average CO₂ emissions savings of 12.38lbs/day. This study also estimates the initial cost per pound of CO₂ emissions reduction per day for each of the mitigation strategies.