1. Global Temperature. NASA (2016) GISS. https://climate.nasa.gov/vitalsigns/global-temperature/
2. Nell G (2017) 2016 was the hottest year yet. Scientists Declare. NPR. https://www.npr.org/sections/thetwo-way/2017/01/18/510405739/2016
3. Adams S, Aich V, Albrecht T, Baarsch F, Boit A, Trujillo N, Hare B (2014) Turn down the heat: confronting the new climate normal. The World Bank
4. Ma Q (1998) Greenhouse gases: refining the role of carbon dioxide. NASA Goddard Institute for Space Studies
5. Mahesh A, Shobha Jasmin KS (2013) Role of renewable energy investment in India: an alternative to CO2 mitigation. Renew Sustain Energy Rev 26:414-424. https://www.giss.Nasa.gov/research/intro/ma