The definition of renewable energy seems clear cut: The sun continues to shine, so solar energy is renewable. The wind continues to blow, so wind turbines churn out renewable power.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/billions-stake-trying-expand-meaning-renewable-energy
[2] http://admin.indiaenvironmentportal.org.in/category/author/felicity-barringer
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/new-york-times-new-york
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/coal
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hydroelectricity
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/renewable-energy
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solar-energy
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/solid-waste
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/garbage
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-energy
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/turbines
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fossil-fuels
[15] http://admin.indiaenvironmentportal.org.in/category/thesaurus/electricity
[16] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nuclear-power-plants
[17] http://admin.indiaenvironmentportal.org.in/category/thesaurus/power-industry
[18] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mexico