Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=54079#.VO1rVSzQrzE Author(s)  Jaesung Choi 1 , Yong Shin Park 1 , Ju Dong Park 1*   Affiliation(s) Upper Great Plains Transportation Institute, North Dakota State University, Fargo, ND, USA . ABSTRACT For the past couple of decades, the transportation sector has made efforts to preserve and improve air quality for public health and sustainable growth between current and future generations. An easily understandable tool to measure the level of air pollution in the transportation sector by considering multiple air pollutants together might raise awareness about clean air to the public, practitioners, state policy planners, and the government. For this reason, this study develops an aggregate air quality index to help prepare decision makers, which could rank a state according to the different levels of multiple air pollutants. The index is developed for...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53935#.VNxjoyzQrzE Author(s) Jaesung Choi 1* , David C. Roberts 2   Affiliation(s) 1 Transportation and Logistics Program, North Dakota State University, Fargo, ND, USA . 2 Department of Agribusiness & Applied Economics, North Dakota State University, Fargo, ND, USA . ABSTRACT Air pollution worsens work environment and increases the likelihood of health risks and even premature death for humans. Owing to the fundamental structure of growth through the combustion of fossil fuels, productivity growth in the transportation industry has affected the natural environment. In this study, the authors use the Malmquist environmental productivity index to consider the effects of air pollution on productivity growth in the air and truck transportation industries, which are the biggest air polluters in the US. This study finds that on average, the air transportatio...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53863#.VNm0byzQrzE Author(s)     Jaesung Choi 1* , David C. Roberts 2   Affiliation(s) 1 Transportation and Logistics Program, North Dakota State University, Fargo, ND, USA . 2 Department of Agribusiness & Applied Economics, North Dakota State University, Fargo, ND, USA . ABSTRACT A variety of research fields has analyzed actual productivity change from environmental pollution through the Malmquist environmental productivity index, but to our best knowledge, no research has thus far been conducted in the transportation sector to evaluate the effects of a CO 2 emissions change on actual productivity. For this reason, this study reviews how actual productivity in the US transportation sector has been affected by the CO 2 emissions change for 2002-2012 and then reveals the driving forces behind it. We find that a CO 2 emissions increase fro...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53863#.VNhjDizQrzE A variety of research fields has analyzed actual productivity change from environmental pollution through the Malmquist environmental productivity index, but to our best knowledge, no research has thus far been conducted in the transportation sector to evaluate the effects of a CO 2 emissions change on actual productivity. For this reason, this study reviews how actual productivity in the US transportation sector has been affected by the CO 2 emissions change for 2002-2012 and then reveals the driving forces behind it. We find that a CO 2 emissions increase from 2002 to 2007 has a negative effect on actual productivity in the US transportation sector, but the CO 2 emissions reduction for 2008-2011 increases actual productivity. A state mainly showing a sustainable growing pattern (decrease in CO 2 emissions and increase in actual productivity) experiences...