How much does air travel warm the planet? New report gives a figure

(Eco Business, 7 Apr 2022) Researchers calculated that aviation contributes around 4 per cent to human-induced global warming, more than most countries do.

When Milan Klöwer spoke to Mongabay, he was fresh off the train in Germany. As a postdoctoral researcher and climate scientist at the University of Oxford, Klöwer said he does his best to avoid flying in planes — one of the worst climate change culprits.

“We’re climate scientists and we try to also lower our own carbon footprint,” Klöwer said, “taking an airplane is the one activity which probably unites all of science in terms of where we are really high emitters.”

Airplanes emit around 100 times more CO2 than a shared bus or train ride, and the emissions of global aviation are around 1 billion tonnes of CO2 per year — more than the emissions of most countries, including Germany. Aviation contributes an estimated 2.4 per cent of global annual CO2 emissions, most of it from commercial travel.

However, Klöwer said, “Most people think of warming in terms of degrees, not tonnes of carbon emitted, so we wanted to calculate that.”

In a recent study published in the journal Environmental Research Letters, Klöwer and his colleagues calculated that aviation contributes around 4 per cent to human-induced global warming and is projected to cause about 0.1° Celsius (0.2° Fahrenheit) of warming by 2050 if aviation continues growing at pre-pandemic rates.

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Eco Business, 7 Apr 2022: How much does air travel warm the planet? New report gives a figure