Was Google right to ‘airbrush’ flight emissions data?

CO2 readings are given for all journeys booked on Google Flights, so green-minded organisations and individuals can choose the most environmentally-friendly option. But as numbers plummet, questions are being asked. 

Data showing carbon dioxide (CO2) emissions from trips booked through Google Flights has been halved, and therefore offers a misleading picture of the real-terms climate impact of any given trip. 

The BBC was first to report news Google Flights emissions readings had plummeted by around 50%, the change resulting from a decision in July to report only CO2 emitted on each journey. In the past, emissions data included kilograms of ‘carbon dioxide equivalent’ (CO2e), which also takes into account other damaging emissions, for example water vapour in contrails that actually have a significantly stronger warming effect than CO2 at high altitude.  

According to Google, difficulty in modelling the exact amount of CO2e for each trip – which varies depending on time of day and location – means old readings were not accurate, and it has instead opted to offer data on what can be measured: direct CO2. However, questions are being asked as to why this significant change was pushed through without a public statement, and whether or not the tech giant has made the right decision given the urgent need to raise awareness about the relationship between global warming and travel. 

‘We strongly believe that non-CO2 effects should be included in the model, but not at the expense of accuracy for individual flight estimates. To address this issue, we’re working closely with leading academics on soon-to-be-published research to better understand how the impact of contrails varies based on critical factors like time of day and region, which will in turn help us more accurately reflect that information to consumers,’ read a statement from Google, issued after the new data decision made headlines. 

In 2019, researchers at the Massachusetts Institute of Technology (MIT) published a study that suggested aviation emissions impact air quality more than the climate. 


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Andrew Lohmann
Andrew Lohmann
1 year ago

It is often put about that things are better but back in the 1960s there milk floats that delivered milk was electric, and there were more electric vehicles in use (but for the very modern EV’s of cause)

Going back further to before 1960 bicycles used to be sold to last 100 years, made with stainless steel and lightweight or regular heavy steel were lighter to dedal and guaranteed forever.

There was a period between 1940, when Winston Churchil said “so much owed by so many to the few people” so we were all in it together and 1979 Labour governement gave people a £6 (I think and it did not happen everywhere), pay rise so everyone was helped. That is much more so all governments looked after their people as an asset now people working with internal combustion engine machines such as on building sites or delivering milk could be foreign labour employed cheap. But people now expect to to be this way and vote for it to continue.

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