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Despite significant recent public concern and media attention to the environmental impacts of food, few studies in the United States have systematically compared the life-cycle greenhouse gas (GHG) emissions associated with food production against long-distance distribution, aka "food-miles." We find that although food is transported long distances in(More)
Increasing user comfort and reducing operation costs have always been two primary objectives of building operations and control strategies. Current building control strategies are unable to incorporate occupant level comfort and meet the operation goals simultaneously. In this paper, we present a novel utility-based building control strategy that optimizes(More)
Keywords: energy conservation energy use green buildings industrial ecology information and communication technology (ICT) technology assessment Summary Nonintrusive load monitoring (NILM) is a technique for deducing the power consumption and operational schedule of individual loads in a building from measurements of the overall voltage and current feeding(More)
Global warming and escalating energy costs have provided the impetus for a worldwide movement to reduce energy consumption and the associated environmental impacts arising from carbon emissions. Telecommunications providers are contributing to this effort by assessing the impacts of their products and offering telepresence and enhanced data services to(More)
Modern technology, together with an advanced economy, can provide a good or service in myriad ways, giving us choices on what to produce and how to produce it. To make those choices more intelligently, society needs to know not only the market price of each alternative, but the associated health and environmental consequences. A fair comparison requires(More)
Telework ͑or telecommuting͒ has been proposed as a way of reducing transportation externalities such as congestion and passenger vehicle energy use. While there is contention among sources about the secondary induced transportation effects, many studies have estimated net benefits as a result of transportation reductions. Analyses including effects from(More)
Decades of research have explored factors that can influence green behavior. However, much less is known about how technology in general, and social technologies in particular can motivate people to participate in green activities. In this paper we describe the goals, design and evaluation of StepGreen.org, a site intended to promote energy-saving(More)
The growing interest in energy-efficient buildings is driving changes in investment, design, and occupant behavior. To better focus cost and resource conservation efforts, electricity consumption feedback can be used to provide motivation, guidance, and verification. Disaggregating by end-use helps both consumers and producers to identify targets for(More)
The U.S. Department of Energy (DOE) estimates that in the coming decades the United States' natural gas (NG) demand for electricity generation will increase. Estimates also suggest that NG supply will increasingly come from imported liquefied natural gas (LNG). Additional supplies of NG could come domestically from the production of synthetic natural gas(More)
A widely cited 1991 study predicted that nearly 150 million personal computers (PCs) would be sent to landfills by 2005. Taking into consideration newer end-of-life disposition options now available, the general premise of the original study is reconsidered. Many fewer computers are being sent to landfills, as many more are being recycled as markets for(More)