More than a nuisance, spam is an environmental hazard. So much so that filtering e-junk would be the equivalent of “taking 2.2 million cars off the road”! Confused? The distribution of spam produces enough electric energy to power 2.4 million homes a year. Every time electricity is used to send this spam out, a small amount of carbon dioxide (CO2) is emitted. Multiplied on a global scale however, the result is 17 million tons of greenhouse CO2 a year.
"Although the respite was only temporary, McAfee said the 'day without spam amounted to talking 2.2 million cars off the road' and that tackling spam should be part of the campaign to reduce carbon emissions."
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