General assumptions: Average 25 g letter, printed on virgin paper and send to landfill.
Material is included.
Production is included.
Distribution is included.
Use is included.
Send to landfill
Berners-Lee, M. (2011). How bad are bananas?: the carbon footprint of everything. Greystone Books. ISBN: 1553658329, 9781553658320
Berners-Lee, M. (2010). What's the carbon footprint of ... using a mobile phone? URL: https://www.theguardian.com/environment/green-living-blog/2010/jun/09/carbon-footprint-mobile-phone
Data Services Inc. (2014). Carbon Footprint Stats: Direct Mail vs. Email. URL: https://www.dataservicesinc.com/newsletter/carbon-footprint-stats-direct-mail-vs-email/