1. https://www.eia.gov/energyexplained/renewable-sources/
2. http://newsroom.unfccc.int/climate-action/renewable-energy-fully-competitive-in-many-countries/
3. http://www.ren21.net/wp-content/uploads/2016/06/GSR_2016_Full_Report.pdf
4. https://www.nationalgeographic.org/encyclopedia/renewable-resources/#:∼:text=Renewable%20resources%20include%20biomass%20energy,from%20corn%20or%20other%20plants)
5. https://economictimes.indiatimes.com/industry/renewables/2030-renewable-energy-target-panel-to-be-set-up-soon-for-mission-500gw/articleshow/88267104.cms