ADMIN . “Why Airplanes Use Kerosene rather than Plain Gasoline for Fuel – Monroe Aerospace News.” Monroeaerospace.com, 2019, monroeaerospace.com/blog/why-airplanes-use-kerosene-rather-than-plain-gasoline-for-fuel/.

alternative airlines . “Airlines That Use Biofuels - Alternative Airlines.” Www.alternativeairlines.com, 13 Jan. 2020, www.alternativeairlines.com/biofuel-airlines. Accessed 13 Mar. 2020.

Anholt, Laurence. Leonardo and the Flying Boy. New York, Barron’s, 2007.

“Are Biofuels the Future of India?” Www.mapsofindia.com, www.mapsofindia.com/my-india/society/are-biofuels-the-future-of-india.

BBC. ““Electric Plane” Crosses Channel.” BBC News, 10 July 2015, www.bbc.com/news/av/technology-33473969/airbus-e-fan-electric-plane-completes-cross-channel-flight. Accessed 28 Feb. 2020.

---. “How to Reduce Your Carbon Footprint When You Fly - BBC News.” YouTube, 13 May 2019, www.youtube.com/watch?v=_OBD2qNFXpI. Accessed 4 Mar. 2020.

bbc. “Climate Change: Should You Fly, Drive or Take the Train?” BBC News, 23 Aug. 2019, www.bbc.com/news/science-environment-49349566.

Berecz, Michael. “7 Technological Advances Changing the Landscape of the Aviation Industry.” Avionics, Avionics, 3 Apr. 2017, www.aviationtoday.com/2017/04/03/7-advances-changing-landscape-aviation-industry/.

Brown , Gavin. Carbon Offsetting . 4 Mar. 2020.

Brown, Gavin. “Biofuels .” Secondary Source , 13 Mar. 2020.

Chen , James. “Biofuel.” Investopedia, 6 Jan. 2019, www.investopedia.com/terms/b/biofuel.asp.

Clark, Duncan. “Aviation Q&A: The Impact of Flying on the Environment.” The Guardian, The Guardian, 6 June 2017, www.theguardian.com/environment/2010/apr/06/aviation-q-and-a.

Concorde's history — Aerospace Bristol. “Aerospace Bristol.” Aerospace Bristol, 2014, aerospacebristol.org/the-story-of-concorde.

Cripps, Karla. “Thomas Cook: A History of One of the World’s Oldest Travel Firms.” CNN Travel, 23 Sept. 2019, edition.cnn.com/travel/article/thomas-cook-history-timeline/index.html.

Deaton , Jeremy. “Eco-Friendly Biofuels Made from Food Waste Could Cut “Flight Shame” among Air Travelers.” NBC News, 17 July 2019, www.nbcnews.com/mach/science/eco-friendly-biofuels-made-food-waste-could-cut-flight-shame-ncna1030801. Accessed 13 Mar. 2020.

Deutsche Welle (www.dw.com. “Biofuels: Good or Bad for the Environment? | DW | 25.06.2018.” DW.COM, 2018, www.dw.com/en/biofuels-good-or-bad-for-the-environment/a-44354834.

Diver, Tony. “Can Indian Rickshaws Survive in a Green and Uber-Ised World? | CityMetric.” Www.citymetric.com, 7 Aug. 2017, www.citymetric.com/transport/can-indian-rickshaws-survive-green-and-uber-ised-world-3233. Accessed 2 Mar. 2020.

Editorial Team. “List of the Top 10 Famous Aircraft in History - Aircraft Compare.” Aircraft Compare, 2020, www.aircraftcompare.com/blog/famous-aircraft/#list-of-famous-aircraft. Accessed 15 Feb. 2020.

“Ethanol Facts-Are Biofuels Sustainable?” EPURE Ethanol Facts, ethanolfacts.eu/question-post/are-biofuels-sustainable/. Accessed 16 Mar. 2020.

Foster , Karen . The Wright Brothers . 2010. LLC, 16 Apr. 2012.

Getty Images . “Leonardo Da Vinci Stock Pictures, Royalty-Free Photos & Images - Getty Images.” Www.gettyimages.in, 27 Mar. 2020, www.gettyimages.in/photos/leonardo-da-vinci?family=creative&license=rf&phrase=leonardo%20da%20vinci&sort=mostpopular#license. Accessed 27 Mar. 2020.

history link. “Boeing 747 Takes Maiden Flight on February 9, 1969.” Historylink.org, 2019, www.historylink.org/File/1181.

just think it out . “Liquid Hydrogen Jet Aircraft : A Carbon-Free Flying Future?” YouTube, 8 Dec. 2019, www.youtube.com/watch?v=WukX4O-hraY. Accessed 4 Mar. 2020.

Lake, Emma. “Why Did Concorde Stop Flying, When Was It Retired from Service and How Fast Did It Fly?” The Sun, The Sun, 2 Aug. 2019, www.thesun.co.uk/tech/2203042/concorde-stop-flying-where-displayed/.

McMahon, Jeff. “The 7 Most Promising Aviation Biofuels.” Forbes, 24 Jan. 2019, www.forbes.com/sites/jeffmcmahon/2019/01/24/the-7-most-promising-biofuels-for-airlines/#576b0098174d. Accessed 20 Mar. 2020.

Moss, Marissa, and C F Payne. Brave Harriet : The First Woman to Fly the English Channel. San Diego, Silver Whistle, 2001.

Niko Kommenda. “How Your Flight Emits as Much CO2 as Many People Do in a Year.” The Guardian, The Guardian, 19 July 2019, www.theguardian.com/environment/ng-interactive/2019/jul/19/carbon-calculator-how-taking-one-flight-emits-as-much-as-many-people-do-in-a-year.

peakpex. “White and Red Virgin Atlantic Passenger Airplane Free Image | Peakpx.” Www.peakpx.com, 21 Feb. 2020, www.peakpx.com/540504/white-and-red-virgin-atlantic-passenger-airplane. Accessed 21 Feb. 2020.

Sampson, Hannah. ““Green” Travel Stunts by Airlines Can’t Erase the Environmental Impact of Flying.” Washington Post, 16 Aug. 2019, www.washingtonpost.com/travel/2019/08/16/green-travel-stunts-by-airlines-cant-erase-environmental-impact-flying/. Accessed 13 Mar. 2020.

shutter stock. “Airbus Logo Images, Stock Photos & Vectors | Shutterstock.” Www.shutterstock.com, 11 Mar. 2020, www.shutterstock.com/search/Airbus+logo.

---. “Yellow Rectangular Metal Tin Kerosene Stock Vector (Royalty Free) 261889982.” Shutterstock.com, 11 Mar. 2020, www.shutterstock.com/image-vector/yellow-rectangular-metal-tin-kerosene-261889982. Accessed 11 Mar. 2020.

“Singapore Airlines - an Excellent, Iconic Asian Brand - Martin Roll.” Martin Roll, 29 Jan. 2019, martinroll.com/resources/articles/strategy/singapore-airlines-an-excellent-asian-brand/.

Team, Editorial. “List of the Top 10 Famous Aircraft in History.” Aircraft Compare, 20 Feb. 2020, www.aircraftcompare.com/blog/famous-aircraft/. Accessed 20 Feb. 2020.

“Types of Biofuels: Ethanol, Biodiesel, Biobutanol.” Www.energydigital.com, www.energydigital.com/renewable-energy/types-biofuels-ethanol-biodiesel-biobutanol. Accessed 16 Mar. 2020.

US EPA,OA. “Global Greenhouse Gas Emissions Data | US EPA.” US EPA, 9 Apr. 2018, www.epa.gov/ghgemissions/global-greenhouse-gas-emissions-data.

“Vision.” Www.virgingalactic.com, www.virgingalactic.com/vision/. Accessed 21 Feb. 2020.

Welle (www.dw.com), Deutsche. “Environmentally Friendly Air Travel? Electric Planes of the Future | DW | 23.04.2018.” DW.COM, 18 Apr. 2018, www.dw.com/en/environmentally-friendly-air-travel-electric-planes-of-the-future/g-43474251. Accessed 13 Mar. 2020.

“White and Red Virgin Atlantic Passenger Airplane Free Image | Peakpx.” Www.peakpx.com, 21 Feb. 2020, www.peakpx.com/540504/white-and-red-virgin-atlantic-passenger-airplane. Accessed 21 Feb. 2020.

“Who Are the Major Airplane Manufacturing Companies?” Investopedia, 2019, www.investopedia.com/ask/answers/050415/what-companies-are-major-players-airline-supply-business.asp.

Wikipedia Contributors. “History of Aviation.” Wikipedia, Wikimedia Foundation, 4 Mar. 2019, en.wikipedia.org/wiki/History_of_aviation.

World's First Commercial Passenger Flight. “World’s First Commercial Passenger Flight.” YouTube, 14 Jan. 2019, youtu.be/apWd65fF77o. Accessed 21 Feb. 2020.