Report details a controlled field experiment to reduce energy use and greenhouse gas emissions in five organizations in London, England. The major finding of this report is that making public commitments and comparing one person’s behavior with that of others significantly increases people’s adoption of energy-saving behaviors—in this case, turning off computers overnight in office settings. A scientific experiment in four office buildings demonstrated that both strategies work. When a small set of conditions are met, simple interventions can drive new, higher levels of energy-saving behavior. Double click the file below to read about how this occurred in “Behavioral Opportunities for Energy Savings in Office Buildings: a London Field Experiment,” which was written by Douglas Jesse Miller, Imperial College London, Faculty of Natural Sciences, Centre for Environmental Policy. Permission was obtained to post this report.