Factories don't need to switch to alternative fuels to be environment friendly. Converting waste energy to power is a smarter, cheaper, and equally green option.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/solution-within
[2] http://admin.indiaenvironmentportal.org.in/category/author/krishna-kant
[3] http://admin.indiaenvironmentportal.org.in/category/journal/fortune
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/alternative-fuels
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-energy
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-efficiency
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/industry
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy