Passengers may be underestimating impact of flying as Google excludes some emissions from online tool.
The way Google calculates the climate impact of your flights has changed.That's because the world's biggest search engine has taken a key driver of global warming out of its online carbon flight calculator.
"It now significantly understates the global impact of aviation on the climate", says Professor David Lee of Manchester Metropolitan University, the author of the most comprehensive scientific assessment of the contribution of air travel to global warming.These include the creation of long thin clouds high up in the atmosphere - known as contrails - which trap heat radiated by the Earth, leading to a net warming effect on our planet.
It says it is working with academics to better understand how contrails and other warming impacts affect specific flights.It recommends companies reflect the additional impacts of flying by multiplying the CO2 emissions a flight generates by a factor of 1.9 - effectively doubling their impact. It is used by Skyscanner, one of the biggest online travel agencies in the world with more than 100 million visitors a month.
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