How Green is our Sky? Unravelling the hidden costs of aviation | Filippo Drera | TEDxNantymoel
A recent flight turbulence incident linked to convective zones suggests aviation's emissions contribute to the warming that exacerbates such dangers. While the UK aims for "net zero generation" by 2050 using Sustainable Aviation Fuel (SAF), the cost burden causes airlines to increase ticket prices, placing the responsibility for change on the consumer to choose environmentally conscious travel options. Ultimately, addressing aviation's impact requires changing transportation philosophies and actively supporting green initiatives within the industry. ## Speakers & Context - Speaker addresses the theme: *“How green are our valley?”* - Example anecdote: On a Singapore Airlines flight, SK 321, involving over 200 people and 20 crew members, turbulence caused 100 injuries and 1 fatality. - Investigation finding: The flight encountered a convective zone, which causes dangerous turbulence known as Clear Air Turbulence. - Connection drawn: Clear Air Turbulence is a meteorological phenomenon mainly affected by global warming. ## Theses & Positions - Clear Air Turbulence is a specific kind of meteorological phenomenon linked to global warming; it is not only generated by, but mainly *affected by*, global warming. - Aviation itself is an emitter of carbon dioxide, which is a primary cause of global warming, leading to the irony that flying can harm its own safety. - Aviation accounts for 2.5% of worldwide carbon dioxide emissions, contributing to 4% of the global warming effect. - For transportation, while ground methods have solutions (electric/hydrogen vehicles), aviation lacks a clear plan to decrease its emissions. - Consumers possess specific power and choice, making individual travel choices crucial in the effort to make the sky greener. ## Concepts & Definitions - **Convective Zone:** A specific area within the atmosphere where temperature is expected to change within a few seconds. - **Clear Air Turbulence (CAT):** Dangerous turbulence generated by rapid temperature changes within specific regions. - **Net Zero Generation:** Zero emissions goal for aviation by 2050, as agreed by the UK government, airline companies, and authorities. - **Sustainable Aviation Fuel (SAF):** Fuel created by recycling oil, cooking oil, palm oil, household waste, and agricultural seeds, usable in current engines. ## Mechanisms & Processes - **Turbulence Event:** Loss of over 50m in less than five seconds due to encountering convective zones. - **SAF Implementation:** SAF can reduce up to 70% of carbon dioxide emissions compared to conventional fuel and can be easily integrated into existing airport refueling systems without new infrastructure costs. - **Economic Barrier to SAF:** Implementing SAF increases fixed costs for airlines, leading to decreased general revenue and forcing ticket price increases. - **Consumer Responsibility Model:** When systemic change is slow, the customer must change their transportation philosophy by prioritizing low-carbon methods or researching the environmental commitment of specific airlines. ## Timeline & Sequence - **Past Incident:** A Singapore Airlines flight, SK 321, occurred in **May** (specific year unstated). - **Historical Benchmark:** The aviation sector’s current emission status is contrasted against the development of electric/hydrogen solutions for ground transport. - **Future Goal:** The United Kingdom government set a goal of "net zero generation" by **2050** for the aviation sector. ## Named Entities - **Singapore Airlines:** Airline involved in the May incident. - **United Kingdom:** Government that signed the agreement for net zero generation. ## Numbers & Data - Incident casualties: Over **200** people and **20** crew members were on board the aircraft. - Incident injuries: **100** people were injured. - Incident fatalities: **1** passenger passed away. - Aviation's contribution to CO2 emissions: **2.5%** of worldwide total. - Aviation's contribution to global warming effect: **4%**. - Transportation carbon breakdown: **74%** from ground transport (cars/trucks); **12%** from aviation; **10%** from ships/rail. - SAF emission reduction potential: Up to **70%** reduction compared to conventional fuel. - SAF usage rate: Only **0.2%** of current airlines use SAF. ## Examples & Cases - **The Turbulence Incident:** The flight encountered a convective zone, demonstrating the immediate danger when air temperature changes rapidly. - **The SAF Source:** Examples of feedstock include recycled oil, cooking oil, palm oil, household waste, and agricultural seeds. - **Ground vs. Air Pollution:** Comparison showing ground transport (cars/trucks) as having viable alternatives (electric/hydrogen), contrasting with the lack of clear alternatives for aviation. ## Tools, Tech & Products - **Sustainable Aviation Fuel (SAF):** Fuel source utilizing recycled waste products. - **Electric vehicles / Hydrogen vehicles:** Cited as potential alternatives for ground transportation. ## Trade-offs & Alternatives - **Aviation vs. Ground Transport:** Ground transport offers concrete, scalable solutions (EVs, hydrogen) that aviation currently lacks. - **SAF vs. Conventional Fuel:** SAF offers significant CO2 reduction (up to 70%) and easy infrastructure adoption, but carries a cost that airlines pass on as higher tickets. - **Global vs. Local Action:** The speaker suggests shifting focus from solely blaming large corporations to taking smaller, more localized actions by consumers. ## Counterarguments & Caveats - The primary barrier to SAF adoption is the **economic point of view**: the increased fixed cost leads to decreased general revenue, necessitating higher ticket prices. - The necessity of flying is sometimes unavoidable, making the choice difficult for the consumer. ## Methodology - Using a case study (Singapore Airlines incident) to illustrate a scientific concept (Clear Air Turbulence) and connect it to a macro-level policy issue (Global Warming/Emissions). - Analyzing comparative data across various transportation modes to highlight systemic weaknesses. ## Conclusions & Recommendations - Consumers must change their transportation philosophy by prioritizing alternatives with a lower carbon footprint when flying is not strictly necessary. - When flying is unavoidable, customers must investigate which airlines are genuinely committed to environmental goals like achieving net zero generation by 2050. - Individuals hold "a specific power and a choice inside this bottle." ## Implications & Consequences - If emission trends continue, the resulting global warming increases the frequency and danger of events like Clear Air Turbulence. - The economic pressure on airlines threatens the pace of adopting critical green technologies like SAF, potentially making greener travel inaccessible to the general public. ## Verbatim Moments - *"In the meanwhile, the cabin crew are quietly moving around the cabin, just in order to make sure everyone is happy, and everything is under control."* - *"It’s totally under chaos."* - *"This Clear Air Turbulence is a specific kind of meteorological phenomena which is linked to global warming; It is not only generated by global warming; however, is mainly affected by this."* - *"ironically, we can say that aviation indirectly is harming her own safety."* - *"on a yearly basis, we have more than 46 million flights all around the world which means 125,000 on a daily basis, which then means, mathematically speaking, more than 5500 flights on this exact moment above our head."* - *"We have 74% of the carbon dioxide emission represented by ground transportation, such as cars, or trucks, and 12% by aviation."* - *"achieve by 2050 as they call ‘net zero generation’"* - *"The main strength of this fuel, first of all, they can reduce up to 70% of carbon dioxide emissions , compared to a conventional fuel."* - *"So Will we be willing to pay a ticket really more, in order to decrease our emission?"* - *"We, as customers, have a specific power and a choice inside this bottle."*