Sustainable butanol biofuels / editors, Anita Singh, Department of Environmental Sciences, Central University of Jammu, Samba, J&K, India, Richa Kothari, Department of Environmental Sciences, Central University of Jammu, Samba, J&K, India, Somvir Bajar, Department of Environmental Science and Engineering, J.C. Bose University of Science and Technology, YMCA, Faridabad, Haryana, India, Vineet Veer Tyagi, School of Energy Management, Shri Mata Vaishno Devi University, Katra, J&K, India