Save the planet I have had email for nine years and I have never thought delete old mails was a positive action in favor the environment. A few days ago I was watching my facebook and I saw a notice from the web site International Radio France that interested me. The notice was about digital pollution caused for save old mails. The mails are saved in a big data central. These data centrals need a lot of energy and a sophisticated cooling system to work. Both of them produce an ecological footprint. It is necessary too much energy to save mails: if you save 30 mails is like turn on a focus for 24 hours. In France people deleted more that 3 million of mails. This action was like turn off 94 000 focuses in one day. The event was organized by two organizations: Newmanity and Fullmobs. It is not frequent people delete mails from their inbox, but if you want to save energy and be greener there are very simple advices: a) do not send attach files if is not necessary or reduce the size of the file; b) do not answer all recipients if is not necessary and c) delete the chat history and only save the current message.