From our anonymous usage data we can estimate how much you can reduce your carbon footprint by unsubscribing from unwanted subscription emails.
Approximately how much mail do you receive each day?
We estimate that you can reduce your carbon footprint by 69g if you unsubscribe from 17 unwanted subscription emails.
This is the same as...
...in a single year. 
Yes! 75% of emails are never opened.  Deleting these emails or setting rules to move them into a folder doesn't stop the carbon impact of receiving the email. By unsubscribing from unwanted mailing lists you can stop the email from being sent at all.
You will also help the senders to reduce their carbon footprint and improve the quality of their mailing lists, which helps all Leave Me Alone users!
The carbon impact of digital activity is calculated in terms of the greenhouse gases that are produced when running servers, computers, routers etc.
The gigantic data centers that power the internet consume vast amounts of electricity and water. Storing, moving, processing, and analyzing data all require energy. Keeping everything cool and running efficiently requires water.
The carbon footprint of something also includes the greenhouse gases emitted when the equipment was manufactured.
With all of these things taken into account, a legitimate email emits on average 4 grams of CO2. 
Keep your emails lean - long messages and emails with attachments produce 12 times more carbon emissions. 
Delete emails you are finished with - storing emails still consumes electricity and water which emits greenhouse gases.
Clean your inbox regularly - unsubscribing from unwanted emails reduces the carbon impact for both you and the sender.