Identifying and Ranking of Alternative Fuels by Using AHP and PROMETHEE II Methods to Find Best Fuel for Bus Rapid Transit System

Nowadays, one of the most significant concerns is regarding to air pollution. Carbon dioxide, a greenhouse gas, is the main pollutant that is warming Earth. Industrialized countries have worked to reduce levels of sulfur dioxide, smog, and smoke in order to improve people's health. The problem of air pollution in the metropolises of Iran has been increased. The identification and development of clean fuels and also alternative fuels can play an important role in solving pollution problem. In this article, to find best fuel in terms of economic, social and environmental aspects which are part of sustainability. So, the multi-criteria decision-making techniques like fuzzy hierarchy analysis method and PROMETHEE used to rank and determine the preferred option for alternative fuels used in high-speed buses in Tehran. The results show that the biodiesel was selected as the best fuel to prevent the air pollution emission among the available options.