In News:

Private aviation is releasing more than its ‘fair share’ of emissions.

Key Highlights:

• Aviation Sector's Global Emissions:
  • The aviation sector contributed 2% of global CO2 emissions in 2022, around 800 Mt CO2 (International Energy Agency).
  • If considered as a nation, aviation would rank among the top 10 emitters worldwide.
  • Emissions from aviation have grown faster than other sectors like rail, road, or shipping in recent decades.
• Private Aviation and Its Impact:
  • Private jets emit 5 to 14 times more CO2 per passenger than commercial flights and 50 times more than trains.
  • Emissions from private aviation increased by 46% between 2019 and 2023.
  • Each private flight contributes 3.6 tonnes of CO2 on average, intensifying global warming.
  • Private aviation is responsible for significant nitrogen oxide (NOx) emissions and the creation of vapor trails, which further amplify environmental damage.

Trends in Private Aviation Growth:

• Global Trends:
  • The number of private jets increased from 25,993 in December 2023 to 26,454 in February 2024.
  • In the U.S., 69% of private aviation activity is concentrated.
  • 8,500 more jets are expected to be delivered in the next 10 years globally.
• Private Aviation in India:
  • 112 private planes were registered in India as of March 2024, placing it among the top 20 countries for private aircraft ownership.
  • India's private aviation sector is expanding, driven by the growing billionaire and millionaire population.
  • Private aircraft ownership in India stands at 1 per 1 lakh population, which is low compared to countries like Malta (46.51 per lakh) and the U.S. (5.45 per lakh).

Emission Reduction Efforts and Solutions:

• Sustainable Aviation Fuels (SAFs):
  • SAFs are bio-based or waste-derived fuels that can reduce carbon emissions by up to 80% compared to conventional jet fuels.
  • Airlines like SpiceJet (2018) and AirAsia (2023) have tested SAFs, but large-scale adoption is hindered by high costs and limited production.
  • India aims to leverage its ethanol production chain, with potential to meet 15-20% of aviation fuel demand by 2050 if only surplus sugar is used.
• Hydrogen and Electric Aviation:
  • Hydrogen offers a higher energy density than kerosene and emits only water vapor, making it a clean fuel alternative. However, hydrogen faces challenges with storage, infrastructure, and aircraft redesign.
  • Battery-electric propulsion offers zero emissions but is currently limited by battery weight, energy density, and charging infrastructure.

India’s Policy and Initiatives:

• Government Initiatives:
  • UDAN Scheme (Ude Desh ka Aam Nagrik) aims to enhance rural connectivity.
  • NABH (Nextgen Airports for Bharat Nirman) seeks to increase airport capacity by five times.
• Sustainability Efforts:
  • Indian airlines have tested SAFs, such as a 25% jatropha oil blend by SpiceJet in 2018.
  • Ethanol for aviation fuel: India plans to use surplus sugar for ethanol, potentially fulfilling 15-20% of aviation fuel needs by 2050.
• Challenges to Decarbonisation:
  • SAFs are costly and limited in availability.
  • Hydrogen requires extensive infrastructure and aircraft redesign.
  • Battery-electric solutions are currently unsuitable for long-haul flights due to energy limitations.