Ironically, I once printed an email with one of those on it (I actually needed to) and that stupid graphic logo is what caused it to print on two pages (otherwise it would only have been one page).

At one point I did a back of the envelope calculation and it came out that 25 e-mails are roughly equivalent to 1 sheet of printed paper. My context was whether to send out a mass e-mail or to put up a few posters around the place. I guess a few posters would be better for the environment in some cases.

I'd love to see how you come up with that number.

I remember that I took into account the amount of storage and the hard drive capacity and the power consumption, etc.

Here's a new calculation: assume your e-mail server has user/server ratio of 1000/1. Assume the server uses 500 watts power (server + UPS + cooling + lighting). Assume each user has 10,000 e-mails stored on this server.

We get 500W/1000 users/10,000 emails per user = 0.00005 Watts/email.

0.00005 Watts/email * 365 * 24 = 0.438 W*hours/email.

Small but significant over your 10,000 emails.

[edit]: fixed my glaring mistakes. That's what happens when you rush.

You're out by a factor of a 10^4. You forgot to divide by 1000 to get KW from W, and you accidentally scaled everything up by 10, too. Still, the correct figure is meaningless too.

I cannot trust your declaration of meaningless, since you seem to think that KW somehow matters to his calculation. There is no term that is originally in KW (thus requiring conversion) nor is there any term which he presents in terms of W which is usually presented in terms of KW (thus having a hidden error).

Yup because he corrected it (read his edit)

I see. Yet another reason to disapprove of edits :/

Also people pay more attention to posters. At least at our office.