Meeting California's 2020 greenhouse gas emissions target will require an average CO2 emissions reduction of approximately 380 lbs per month per person in the U.S. For the typical two-person household, 760 lbs per month can be saved by employing such near-term measures as reducing monthly miles traveled (by auto and aircraft) and altering behaviors related to appliance energy consumption (e.g., employing a smart thermostat, reducing water heater temperature settings, and eliminating phantom loads). Additional long-term savings can be obtained by purchasing more fuel efficient vehicles, reducing home floor area, moving into multi-family housing units with shared walls, and replacing old appliances with energy efficient products. To get a sense of where these strategies exist for individuals and households, this paper quantifies greenhouse gas reductions from these and other household decisions. Upstream and downstream emissions-reductions policies are discussed, including taxation, cap and trade among energy producers, and household-level carbon budgets. Given the variability in U.S. climate zones, the sizable contributions of both upstream and downstream carbon sources, and the variety of electricity generation processes, a combination of policy measures seems warranted, in order to achieve recommended targets in a rapid, equitable, and relatively pain-free manner.
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