Yet many email signatures contain superfluous elements, such as legal notices, company logos and promotional messages, adding unnecessarily to the quantity of information exchanged.
Joshua Pearce, professor of information technology and innovation at Western University, has examined this little-known impact in a study published in the journal Sustainable Futures and reported by The Conversation.
In particular, he looked at two recent additions to signatures: the stating of gender pronouns and land acknowledgements. Although symbolically important, this information slightly increases the size of emails and, consequently, their carbon footprint.
His study reveals that in Canada, where around 15% of professionals add their pronouns to their signature, this addition could generate enough emissions to be responsible for one premature death a year.
A striking figure, given that, according to some estimates, 1,000 tonnes of carbon dioxide emitted can cause the premature death of one person.
The impact is even more significant with longer signatures, particularly those incorporating confidentiality clauses or graphic elements.
Clearly, reducing the size of your emails could be a simple but effective gesture to limit your digital footprint.
Fortunately, solutions do exist.
Rather than systematically including signatures, a simple link to a dedicated page could suffice.
A more radical alternative could be to do away with signatures altogether. After all, emails already contain the sender’s details in the header, and nobody (or almost nobody) signs their SMS messages.
In addition to signatures, there’s another scourge that adds to our carbon footprint: spam.
Spam accounts for more than half of all emails sent, and even though it often remains unread, its storage and forwarding generate a sizable environmental footprint.
There are measures in place to address this, such as taxes on emails or opt-in systems, but they do little to curb the phenomenon.
At a time when digital technology is taking on an ever-greater role in people’s lives, it’s becoming essential to rethink habits.
Reducing the size of your emails, avoiding superfluous messages and streamlining your signatures are all simple gestures which, on a large scale, can have a real impact.
In the fight against climate change, every action counts… even clicking on “delete signature.”