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Are you aware that your emails are ruining the environment? Sending emails has such a high carbon footprint that just cutting out a single email a day could have the same effect as removing thousands of cars from the street, according to a new study of habits in the UK, commissioned by OVO Energy. The study found that one less email a day would cut 16,433 tons of carbon caused by the high-energy servers used to send the online messages.

That’s the equivalent of 81,152 flights to Madrid or taking 3,334 diesel cars off the road, the research said. According to the research, more than 64 million “unnecessary emails” are sent every day in the UK, contributing to 23,475 tons of carbon a year to its footprint.

The top 10 most “unnecessary” emails include: “Thank you,” “Thanks,” “Have a good weekend,” “Received,” “Appreciated,” “Have a good evening,” “Did you get/see this,” “Cheers,” “You too,” and “LOL,” according to the study.

OVO Energy is now calling for tech-savvy folks to “think before you thank” in order to save more than 16,433 tons of carbon per year.