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Renewable energy technologies are promising, yet, very little is known about its role as a limiting factor in fossil fuel-attributable environmental degradation — especially in high-income countries. This study investigated the dynamic effect of renewable energy consumption, economic growth, biocapacity and trade policy on environmental degradation in the United States from 1985Q1 to 2014Q4. To achieve this objective, the study applied an autoregressive distributed lag (ARDL) model to obtain the long-run and short-run dynamic coefficients. Toda-Yamamoto causality test was used to examine the direction of causality while Cholesky decomposition test was for innovative accounting to validate the estimated models. The empirical results divulged that a decline in environmental degradation can be attributed to an increase in renewable energy consumption through its negative effects on ecological footprint. Economic growth and biocapacity were found to exert upward pressure on ecological footprint; however, trade policy exerts downward pressure on ecological footprint. A two-sided causal relationship was established between economic growth and ecological footprint as well as economic growth and biocapacity. In contrast, a one-way causality was confirmed running from trade policy to renewable energy consumption and from renewable energy consumption to biocapacity. The innovative accounting revealed that 14.79% and 8.41% of renewable energy consumption and trade policy caused 0.60% and 9.88% deterioration in the environment. Hence, country-specific energy policies that increase the share of renewable energy in the energy portfolio are recommended. • The dynamic role of renewable energy in environmental sustainability was examined. • Renewable energy plus sustained economic growth slow environmental degradation. • Renewable energy was the lowest contributor to shocks in ecological footprint. • Growth and biocapacity were found to exert upward pressure on ecological footprint. [ABSTRACT FROM AUTHOR]

In the United States, the food industry alone accounts for approximately 19% of the total energy consumed. The objective of this study is to forecast the food-related energy consumption and evaluate policy alternatives for reducing food related energy consumption in the medium and long term. Influential factors of energy consumption in the food industry include population growth rate, GDP, agriculture's share of GDP, food waste, technologies, and agricultural investment. Based on the life cycle of the food industry, five life stages were considered: agricultural production, industrial processing and packaging, transportation, wholesale and retail, and household. In this study, based on the causal relationships and feedback loops between these factors and the energy consumed for each life stage, a system dynamics (SD) model was designed to simulate the situation for the US food industry. Policy options of reducing waste percentage and improving industrial energy productivity are incorporated for building the energy use mitigation scenarios. By implementing the integrated mitigation scenarios, a 9.43% reduction in total food system energy consumption can be attained in 2030. [ABSTRACT FROM AUTHOR]

The United States lags other nations in adapting policy approaches that would stimulate cleaner consumption of Information and Communication Technologies (ICT) by limiting the use of potentially toxic materials in electronics production. This study analyzes nationally-representative U.S. data from a unique web-based survey to investigate whether American households are willing to support greening the ICT devices by paying a premium for a green cell phone. Green cell phone does not contain hazardous materials and can be safely disposed with general municipal waste. A survey-based economic technique of contingent valuation was utilized to examine the relationship between socio-psychological and economic parameters for evaluating and explaining a stated willingness to pay a green phone premium, controlling for socio-economic and demographic characteristics. The findings indicate that respondents with higher scores on general environmental beliefs, greater engagement in pro-environmental behavior, and positive attitudes toward recycling small electronics are likely to be willing to pay a premium to purchase a green cell phone compared to a conventional cell phone with similar capabilities. This suggests that educating the public about benefits of electronics recycling, promoting pro-environmental norms, and encouraging pro-environmental behavior can help increase public support for implementing policies aimed at greening ICT production and consumption in the United Sates. [ABSTRACT FROM AUTHOR]