BBC News - Justin Rowlatt

The way Google calculates the climate impact of your flights has changed.

Your flights now appear to have much less impact on the environment than they did before.

That's because the world's biggest search engine has taken a key driver of global warming out of its online carbon flight calculator.

"Google has airbrushed a huge chunk of the aviation industry's climate impacts from its pages" says Dr Doug Parr, chief scientist of Greenpeace. July, Google decided to exclude all the global warming impacts of flying except CO2.

Some experts say Google's calculations now represent just over half of the real impact on the climate of flights.

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