Do airplanes contribute to global warming?

Emissions from aviation are a significant contributor to climate change. Airplanes burn fossil fuel which not only releases CO2 emissions but also has strong warming non-CO2 effects due to nitrogen oxides (NOx), vapour trails and cloud formation triggered by the altitude at which aircraft operate.



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Air travel accounts for about 4 percent of human-induced global warming, and the United Nations warns that airplane emissions are set to triple by 2050. Planes are becoming more efficient, but our appetite for air travel is outpacing the industry's environmental gains.

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Air traffic represents less than 2-3% of the global CO2 emissions whereas road traffic accounts for around 10% of these direct emissions. Still, planes remain among the most polluting means of transport, together with cars.

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Just exactly how bad is flying really? Air travel accounts for 2.5% of global carbon emissions. In the US, flying accounted for 8% of transportation emissions, but less than 3% of total carbon emissions.

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In fact, unless you're looking to venture from Los Altos to LA off-road through state parks the whole way—in a Hummer with Tonka-truck mud tires—driving is generally greener than flying.

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As you add more passengers, the amount of emissions your party produces increases on a flight. In contrast, the amount of greenhouse gas emissions, which trap heat and lead to global warming, produced decreases per person when driving. The break-even point for driving vs. flying in this example is 2.03 people.

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Aviation contributes about 3 percent of all carbon emissions worldwide, which would make it sixth in the world if it were a country. The airline industry's contribution to the climate problem is worse than that, however, if we consider that flight also produces pollution other than carbon.

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Aviation is responsible for between 2pc and 3pc of global carbon emissions. And Ms Thunberg continues to refuse to fly because of the impact on the environment.

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Airplanes become more fuel efficient with every generation, and there are plenty of ways old planes can be spruced up. Winglets can be added on to the end of wing's, reducing drag and reducing fuel consumption by 6 percent.

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Finally, the plane is the most polluting means of transport and the one that generates the most greenhouse emissions.

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Compared to flying to a destination and staying in a hotel, cruising almost always has a far higher emissions profile, according to research by Comer and others. A five-night, 1,200 mile cruise results in about 1,100 lbs of CO2 emissions, according to Comer.

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Train travel is the most ecologically friendly option, aside from walking or bicycling. They emit 66-75% less carbon emissions than other forms of transportation, even if they're electric.

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Compared to flying, using the train emits on average six times less GHG emissions.

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Top 10 polluters
  • China, with more than 10,065 million tons of CO2 released.
  • United States, with 5,416 million tons of CO2.
  • India, with 2,654 million tons of CO2.
  • Russia, with 1,711 million tons of CO2.
  • Japan, 1,162 million tons of CO2.
  • Germany, 759 million tons of CO2.
  • Iran, 720 million tons of CO2.


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