• We’re not against printing. We’re against wasting resources.
  We don’t want to stop people printing. We simply think that sometimes, people, and not everyone, need reminding that wasting paper, ink and toner doesn’t make economic or environmental sense.
  Not just email
• Our message isn’t limited to emails.
  Every day, people hit the print button without really considering why. Often it’s because we’re used to seeing things on paper we have some irrational desire to hoard information “so we’ve got it to hand”, but so often this spontaneous compulsion to print is unnecessary.
• More than half of all pages printed are never used
  We estimate that over 50% of pages printed are never looked at. Consider how many times an almost completely blank “page 2 of 2” comes out of your printer when printing emails and documents.

https://thinkbeforeprinting.org/